You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2017/06/16 15:00:39 UTC

[13/49] hbase-site git commit: Published site at 82d554e3783372cc6b05489452c815b57c06f6cd.

http://git-wip-us.apache.org/repos/asf/hbase-site/blob/cd7ae54c/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/StoreScanner.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/StoreScanner.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/StoreScanner.html
index eda63e0..b2b7ff9 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/StoreScanner.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/StoreScanner.html
@@ -176,7 +176,7 @@
 <span class="sourceLineNo">168</span><a name="line.168"></a>
 <span class="sourceLineNo">169</span>  /** An internal constructor. */<a name="line.169"></a>
 <span class="sourceLineNo">170</span>  protected StoreScanner(Store store, Scan scan, final ScanInfo scanInfo,<a name="line.170"></a>
-<span class="sourceLineNo">171</span>      final NavigableSet&lt;byte[]&gt; columns, long readPt, boolean cacheBlocks) {<a name="line.171"></a>
+<span class="sourceLineNo">171</span>      final NavigableSet&lt;byte[]&gt; columns, long readPt, boolean cacheBlocks, ScanType scanType) {<a name="line.171"></a>
 <span class="sourceLineNo">172</span>    this.readPt = readPt;<a name="line.172"></a>
 <span class="sourceLineNo">173</span>    this.store = store;<a name="line.173"></a>
 <span class="sourceLineNo">174</span>    this.cacheBlocks = cacheBlocks;<a name="line.174"></a>
@@ -198,952 +198,961 @@
 <span class="sourceLineNo">190</span>    if (get) {<a name="line.190"></a>
 <span class="sourceLineNo">191</span>      this.readType = Scan.ReadType.PREAD;<a name="line.191"></a>
 <span class="sourceLineNo">192</span>      this.scanUsePread = true;<a name="line.192"></a>
-<span class="sourceLineNo">193</span>    } else {<a name="line.193"></a>
-<span class="sourceLineNo">194</span>      if (scan.getReadType() == Scan.ReadType.DEFAULT) {<a name="line.194"></a>
-<span class="sourceLineNo">195</span>        this.readType = scanInfo.isUsePread() ? Scan.ReadType.PREAD : Scan.ReadType.DEFAULT;<a name="line.195"></a>
-<span class="sourceLineNo">196</span>      } else {<a name="line.196"></a>
-<span class="sourceLineNo">197</span>        this.readType = scan.getReadType();<a name="line.197"></a>
-<span class="sourceLineNo">198</span>      }<a name="line.198"></a>
-<span class="sourceLineNo">199</span>      // Always start with pread unless user specific stream. Will change to stream later if<a name="line.199"></a>
-<span class="sourceLineNo">200</span>      // readType is default if the scan keeps running for a long time.<a name="line.200"></a>
-<span class="sourceLineNo">201</span>      this.scanUsePread = this.readType != Scan.ReadType.STREAM;<a name="line.201"></a>
-<span class="sourceLineNo">202</span>    }<a name="line.202"></a>
-<span class="sourceLineNo">203</span>    this.preadMaxBytes = scanInfo.getPreadMaxBytes();<a name="line.203"></a>
-<span class="sourceLineNo">204</span>    this.cellsPerHeartbeatCheck = scanInfo.getCellsPerTimeoutCheck();<a name="line.204"></a>
-<span class="sourceLineNo">205</span>    // Parallel seeking is on if the config allows and more there is more than one store file.<a name="line.205"></a>
-<span class="sourceLineNo">206</span>    if (this.store != null &amp;&amp; this.store.getStorefilesCount() &gt; 1) {<a name="line.206"></a>
-<span class="sourceLineNo">207</span>      RegionServerServices rsService = ((HStore) store).getHRegion().getRegionServerServices();<a name="line.207"></a>
-<span class="sourceLineNo">208</span>      if (rsService != null &amp;&amp; scanInfo.isParallelSeekEnabled()) {<a name="line.208"></a>
-<span class="sourceLineNo">209</span>        this.parallelSeekEnabled = true;<a name="line.209"></a>
-<span class="sourceLineNo">210</span>        this.executor = rsService.getExecutorService();<a name="line.210"></a>
-<span class="sourceLineNo">211</span>      }<a name="line.211"></a>
-<span class="sourceLineNo">212</span>    }<a name="line.212"></a>
-<span class="sourceLineNo">213</span>  }<a name="line.213"></a>
-<span class="sourceLineNo">214</span><a name="line.214"></a>
-<span class="sourceLineNo">215</span>  private void addCurrentScanners(List&lt;? extends KeyValueScanner&gt; scanners) {<a name="line.215"></a>
-<span class="sourceLineNo">216</span>    this.currentScanners.addAll(scanners);<a name="line.216"></a>
-<span class="sourceLineNo">217</span>  }<a name="line.217"></a>
-<span class="sourceLineNo">218</span><a name="line.218"></a>
-<span class="sourceLineNo">219</span>  /**<a name="line.219"></a>
-<span class="sourceLineNo">220</span>   * Opens a scanner across memstore, snapshot, and all StoreFiles. Assumes we<a name="line.220"></a>
-<span class="sourceLineNo">221</span>   * are not in a compaction.<a name="line.221"></a>
-<span class="sourceLineNo">222</span>   *<a name="line.222"></a>
-<span class="sourceLineNo">223</span>   * @param store who we scan<a name="line.223"></a>
-<span class="sourceLineNo">224</span>   * @param scan the spec<a name="line.224"></a>
-<span class="sourceLineNo">225</span>   * @param columns which columns we are scanning<a name="line.225"></a>
-<span class="sourceLineNo">226</span>   * @throws IOException<a name="line.226"></a>
-<span class="sourceLineNo">227</span>   */<a name="line.227"></a>
-<span class="sourceLineNo">228</span>  public StoreScanner(Store store, ScanInfo scanInfo, Scan scan, final NavigableSet&lt;byte[]&gt; columns,<a name="line.228"></a>
-<span class="sourceLineNo">229</span>      long readPt)<a name="line.229"></a>
-<span class="sourceLineNo">230</span>  throws IOException {<a name="line.230"></a>
-<span class="sourceLineNo">231</span>    this(store, scan, scanInfo, columns, readPt, scan.getCacheBlocks());<a name="line.231"></a>
-<span class="sourceLineNo">232</span>    if (columns != null &amp;&amp; scan.isRaw()) {<a name="line.232"></a>
-<span class="sourceLineNo">233</span>      throw new DoNotRetryIOException("Cannot specify any column for a raw scan");<a name="line.233"></a>
-<span class="sourceLineNo">234</span>    }<a name="line.234"></a>
-<span class="sourceLineNo">235</span>    matcher = UserScanQueryMatcher.create(scan, scanInfo, columns, oldestUnexpiredTS, now,<a name="line.235"></a>
-<span class="sourceLineNo">236</span>      store.getCoprocessorHost());<a name="line.236"></a>
-<span class="sourceLineNo">237</span><a name="line.237"></a>
-<span class="sourceLineNo">238</span>    this.store.addChangedReaderObserver(this);<a name="line.238"></a>
-<span class="sourceLineNo">239</span><a name="line.239"></a>
-<span class="sourceLineNo">240</span>    try {<a name="line.240"></a>
-<span class="sourceLineNo">241</span>      // Pass columns to try to filter out unnecessary StoreFiles.<a name="line.241"></a>
-<span class="sourceLineNo">242</span>      List&lt;KeyValueScanner&gt; scanners = getScannersNoCompaction();<a name="line.242"></a>
-<span class="sourceLineNo">243</span><a name="line.243"></a>
-<span class="sourceLineNo">244</span>      // Seek all scanners to the start of the Row (or if the exact matching row<a name="line.244"></a>
-<span class="sourceLineNo">245</span>      // key does not exist, then to the start of the next matching Row).<a name="line.245"></a>
-<span class="sourceLineNo">246</span>      // Always check bloom filter to optimize the top row seek for delete<a name="line.246"></a>
-<span class="sourceLineNo">247</span>      // family marker.<a name="line.247"></a>
-<span class="sourceLineNo">248</span>      seekScanners(scanners, matcher.getStartKey(), explicitColumnQuery &amp;&amp; lazySeekEnabledGlobally,<a name="line.248"></a>
-<span class="sourceLineNo">249</span>        parallelSeekEnabled);<a name="line.249"></a>
-<span class="sourceLineNo">250</span><a name="line.250"></a>
-<span class="sourceLineNo">251</span>      // set storeLimit<a name="line.251"></a>
-<span class="sourceLineNo">252</span>      this.storeLimit = scan.getMaxResultsPerColumnFamily();<a name="line.252"></a>
-<span class="sourceLineNo">253</span><a name="line.253"></a>
-<span class="sourceLineNo">254</span>      // set rowOffset<a name="line.254"></a>
-<span class="sourceLineNo">255</span>      this.storeOffset = scan.getRowOffsetPerColumnFamily();<a name="line.255"></a>
-<span class="sourceLineNo">256</span>      addCurrentScanners(scanners);<a name="line.256"></a>
-<span class="sourceLineNo">257</span>      // Combine all seeked scanners with a heap<a name="line.257"></a>
-<span class="sourceLineNo">258</span>      resetKVHeap(scanners, store.getComparator());<a name="line.258"></a>
-<span class="sourceLineNo">259</span>    } catch (IOException e) {<a name="line.259"></a>
-<span class="sourceLineNo">260</span>      // remove us from the HStore#changedReaderObservers here or we'll have no chance to<a name="line.260"></a>
-<span class="sourceLineNo">261</span>      // and might cause memory leak<a name="line.261"></a>
-<span class="sourceLineNo">262</span>      this.store.deleteChangedReaderObserver(this);<a name="line.262"></a>
-<span class="sourceLineNo">263</span>      throw e;<a name="line.263"></a>
-<span class="sourceLineNo">264</span>    }<a name="line.264"></a>
-<span class="sourceLineNo">265</span>  }<a name="line.265"></a>
-<span class="sourceLineNo">266</span><a name="line.266"></a>
-<span class="sourceLineNo">267</span>  /**<a name="line.267"></a>
-<span class="sourceLineNo">268</span>   * Used for compactions.&lt;p&gt;<a name="line.268"></a>
-<span class="sourceLineNo">269</span>   *<a name="line.269"></a>
-<span class="sourceLineNo">270</span>   * Opens a scanner across specified StoreFiles.<a name="line.270"></a>
-<span class="sourceLineNo">271</span>   * @param store who we scan<a name="line.271"></a>
-<span class="sourceLineNo">272</span>   * @param scan the spec<a name="line.272"></a>
-<span class="sourceLineNo">273</span>   * @param scanners ancillary scanners<a name="line.273"></a>
-<span class="sourceLineNo">274</span>   * @param smallestReadPoint the readPoint that we should use for tracking<a name="line.274"></a>
-<span class="sourceLineNo">275</span>   *          versions<a name="line.275"></a>
-<span class="sourceLineNo">276</span>   */<a name="line.276"></a>
-<span class="sourceLineNo">277</span>  public StoreScanner(Store store, ScanInfo scanInfo, Scan scan,<a name="line.277"></a>
-<span class="sourceLineNo">278</span>      List&lt;? extends KeyValueScanner&gt; scanners, ScanType scanType,<a name="line.278"></a>
-<span class="sourceLineNo">279</span>      long smallestReadPoint, long earliestPutTs) throws IOException {<a name="line.279"></a>
-<span class="sourceLineNo">280</span>    this(store, scanInfo, scan, scanners, scanType, smallestReadPoint, earliestPutTs, null, null);<a name="line.280"></a>
-<span class="sourceLineNo">281</span>  }<a name="line.281"></a>
-<span class="sourceLineNo">282</span><a name="line.282"></a>
-<span class="sourceLineNo">283</span>  /**<a name="line.283"></a>
-<span class="sourceLineNo">284</span>   * Used for compactions that drop deletes from a limited range of rows.&lt;p&gt;<a name="line.284"></a>
-<span class="sourceLineNo">285</span>   *<a name="line.285"></a>
-<span class="sourceLineNo">286</span>   * Opens a scanner across specified StoreFiles.<a name="line.286"></a>
-<span class="sourceLineNo">287</span>   * @param store who we scan<a name="line.287"></a>
-<span class="sourceLineNo">288</span>   * @param scan the spec<a name="line.288"></a>
-<span class="sourceLineNo">289</span>   * @param scanners ancillary scanners<a name="line.289"></a>
-<span class="sourceLineNo">290</span>   * @param smallestReadPoint the readPoint that we should use for tracking versions<a name="line.290"></a>
-<span class="sourceLineNo">291</span>   * @param dropDeletesFromRow The inclusive left bound of the range; can be EMPTY_START_ROW.<a name="line.291"></a>
-<span class="sourceLineNo">292</span>   * @param dropDeletesToRow The exclusive right bound of the range; can be EMPTY_END_ROW.<a name="line.292"></a>
-<span class="sourceLineNo">293</span>   */<a name="line.293"></a>
-<span class="sourceLineNo">294</span>  public StoreScanner(Store store, ScanInfo scanInfo, Scan scan,<a name="line.294"></a>
-<span class="sourceLineNo">295</span>      List&lt;? extends KeyValueScanner&gt; scanners, long smallestReadPoint, long earliestPutTs,<a name="line.295"></a>
-<span class="sourceLineNo">296</span>      byte[] dropDeletesFromRow, byte[] dropDeletesToRow) throws IOException {<a name="line.296"></a>
-<span class="sourceLineNo">297</span>    this(store, scanInfo, scan, scanners, ScanType.COMPACT_RETAIN_DELETES, smallestReadPoint,<a name="line.297"></a>
-<span class="sourceLineNo">298</span>        earliestPutTs, dropDeletesFromRow, dropDeletesToRow);<a name="line.298"></a>
-<span class="sourceLineNo">299</span>  }<a name="line.299"></a>
-<span class="sourceLineNo">300</span><a name="line.300"></a>
-<span class="sourceLineNo">301</span>  private StoreScanner(Store store, ScanInfo scanInfo, Scan scan,<a name="line.301"></a>
-<span class="sourceLineNo">302</span>      List&lt;? extends KeyValueScanner&gt; scanners, ScanType scanType, long smallestReadPoint,<a name="line.302"></a>
-<span class="sourceLineNo">303</span>      long earliestPutTs, byte[] dropDeletesFromRow, byte[] dropDeletesToRow) throws IOException {<a name="line.303"></a>
-<span class="sourceLineNo">304</span>    this(store, scan, scanInfo, null,<a name="line.304"></a>
-<span class="sourceLineNo">305</span>        ((HStore) store).getHRegion().getReadPoint(IsolationLevel.READ_COMMITTED), false);<a name="line.305"></a>
-<span class="sourceLineNo">306</span>    if (scan.hasFilter() || (scan.getStartRow() != null &amp;&amp; scan.getStartRow().length &gt; 0)<a name="line.306"></a>
-<span class="sourceLineNo">307</span>        || (scan.getStopRow() != null &amp;&amp; scan.getStopRow().length &gt; 0)<a name="line.307"></a>
-<span class="sourceLineNo">308</span>        || !scan.getTimeRange().isAllTime()) {<a name="line.308"></a>
-<span class="sourceLineNo">309</span>      // use legacy query matcher since we do not consider the scan object in our code. Only used to<a name="line.309"></a>
-<span class="sourceLineNo">310</span>      // keep compatibility for coprocessor.<a name="line.310"></a>
-<span class="sourceLineNo">311</span>      matcher = LegacyScanQueryMatcher.create(scan, scanInfo, null, scanType, smallestReadPoint,<a name="line.311"></a>
-<span class="sourceLineNo">312</span>        earliestPutTs, oldestUnexpiredTS, now, dropDeletesFromRow, dropDeletesToRow,<a name="line.312"></a>
-<span class="sourceLineNo">313</span>        store.getCoprocessorHost());<a name="line.313"></a>
-<span class="sourceLineNo">314</span>    } else {<a name="line.314"></a>
-<span class="sourceLineNo">315</span>      matcher = CompactionScanQueryMatcher.create(scanInfo, scanType, smallestReadPoint,<a name="line.315"></a>
-<span class="sourceLineNo">316</span>        earliestPutTs, oldestUnexpiredTS, now, dropDeletesFromRow, dropDeletesToRow,<a name="line.316"></a>
-<span class="sourceLineNo">317</span>        store.getCoprocessorHost());<a name="line.317"></a>
-<span class="sourceLineNo">318</span>    }<a name="line.318"></a>
-<span class="sourceLineNo">319</span><a name="line.319"></a>
-<span class="sourceLineNo">320</span>    // Filter the list of scanners using Bloom filters, time range, TTL, etc.<a name="line.320"></a>
-<span class="sourceLineNo">321</span>    scanners = selectScannersFrom(scanners);<a name="line.321"></a>
-<span class="sourceLineNo">322</span><a name="line.322"></a>
-<span class="sourceLineNo">323</span>    // Seek all scanners to the initial key<a name="line.323"></a>
-<span class="sourceLineNo">324</span>    seekScanners(scanners, matcher.getStartKey(), false, parallelSeekEnabled);<a name="line.324"></a>
-<span class="sourceLineNo">325</span>    addCurrentScanners(scanners);<a name="line.325"></a>
-<span class="sourceLineNo">326</span>    // Combine all seeked scanners with a heap<a name="line.326"></a>
-<span class="sourceLineNo">327</span>    resetKVHeap(scanners, store.getComparator());<a name="line.327"></a>
-<span class="sourceLineNo">328</span>  }<a name="line.328"></a>
-<span class="sourceLineNo">329</span><a name="line.329"></a>
-<span class="sourceLineNo">330</span>  @VisibleForTesting<a name="line.330"></a>
-<span class="sourceLineNo">331</span>  StoreScanner(final Scan scan, ScanInfo scanInfo,<a name="line.331"></a>
-<span class="sourceLineNo">332</span>      ScanType scanType, final NavigableSet&lt;byte[]&gt; columns,<a name="line.332"></a>
-<span class="sourceLineNo">333</span>      final List&lt;? extends KeyValueScanner&gt; scanners) throws IOException {<a name="line.333"></a>
-<span class="sourceLineNo">334</span>    this(scan, scanInfo, scanType, columns, scanners,<a name="line.334"></a>
-<span class="sourceLineNo">335</span>        HConstants.LATEST_TIMESTAMP,<a name="line.335"></a>
-<span class="sourceLineNo">336</span>        // 0 is passed as readpoint because the test bypasses Store<a name="line.336"></a>
-<span class="sourceLineNo">337</span>        0);<a name="line.337"></a>
-<span class="sourceLineNo">338</span>  }<a name="line.338"></a>
-<span class="sourceLineNo">339</span><a name="line.339"></a>
-<span class="sourceLineNo">340</span>  @VisibleForTesting<a name="line.340"></a>
-<span class="sourceLineNo">341</span>  StoreScanner(final Scan scan, ScanInfo scanInfo,<a name="line.341"></a>
-<span class="sourceLineNo">342</span>    ScanType scanType, final NavigableSet&lt;byte[]&gt; columns,<a name="line.342"></a>
-<span class="sourceLineNo">343</span>    final List&lt;? extends KeyValueScanner&gt; scanners, long earliestPutTs)<a name="line.343"></a>
-<span class="sourceLineNo">344</span>        throws IOException {<a name="line.344"></a>
-<span class="sourceLineNo">345</span>    this(scan, scanInfo, scanType, columns, scanners, earliestPutTs,<a name="line.345"></a>
-<span class="sourceLineNo">346</span>      // 0 is passed as readpoint because the test bypasses Store<a name="line.346"></a>
-<span class="sourceLineNo">347</span>      0);<a name="line.347"></a>
-<span class="sourceLineNo">348</span>  }<a name="line.348"></a>
-<span class="sourceLineNo">349</span><a name="line.349"></a>
-<span class="sourceLineNo">350</span>  public StoreScanner(final Scan scan, ScanInfo scanInfo, ScanType scanType,<a name="line.350"></a>
-<span class="sourceLineNo">351</span>      final NavigableSet&lt;byte[]&gt; columns, final List&lt;? extends KeyValueScanner&gt; scanners, long earliestPutTs,<a name="line.351"></a>
-<span class="sourceLineNo">352</span>      long readPt) throws IOException {<a name="line.352"></a>
-<span class="sourceLineNo">353</span>    this(null, scan, scanInfo, columns, readPt,<a name="line.353"></a>
-<span class="sourceLineNo">354</span>        scanType == ScanType.USER_SCAN ? scan.getCacheBlocks() : false);<a name="line.354"></a>
-<span class="sourceLineNo">355</span>    if (scanType == ScanType.USER_SCAN) {<a name="line.355"></a>
-<span class="sourceLineNo">356</span>      this.matcher = UserScanQueryMatcher.create(scan, scanInfo, columns, oldestUnexpiredTS, now,<a name="line.356"></a>
-<span class="sourceLineNo">357</span>        null);<a name="line.357"></a>
-<span class="sourceLineNo">358</span>    } else {<a name="line.358"></a>
-<span class="sourceLineNo">359</span>      if (scan.hasFilter() || (scan.getStartRow() != null &amp;&amp; scan.getStartRow().length &gt; 0)<a name="line.359"></a>
-<span class="sourceLineNo">360</span>          || (scan.getStopRow() != null &amp;&amp; scan.getStopRow().length &gt; 0)<a name="line.360"></a>
-<span class="sourceLineNo">361</span>          || !scan.getTimeRange().isAllTime() || columns != null) {<a name="line.361"></a>
-<span class="sourceLineNo">362</span>        // use legacy query matcher since we do not consider the scan object in our code. Only used<a name="line.362"></a>
-<span class="sourceLineNo">363</span>        // to keep compatibility for coprocessor.<a name="line.363"></a>
-<span class="sourceLineNo">364</span>        matcher = LegacyScanQueryMatcher.create(scan, scanInfo, columns, scanType, Long.MAX_VALUE,<a name="line.364"></a>
-<span class="sourceLineNo">365</span>          earliestPutTs, oldestUnexpiredTS, now, null, null, store.getCoprocessorHost());<a name="line.365"></a>
-<span class="sourceLineNo">366</span>      } else {<a name="line.366"></a>
-<span class="sourceLineNo">367</span>        this.matcher = CompactionScanQueryMatcher.create(scanInfo, scanType, Long.MAX_VALUE,<a name="line.367"></a>
-<span class="sourceLineNo">368</span>          earliestPutTs, oldestUnexpiredTS, now, null, null, null);<a name="line.368"></a>
-<span class="sourceLineNo">369</span>      }<a name="line.369"></a>
-<span class="sourceLineNo">370</span>    }<a name="line.370"></a>
-<span class="sourceLineNo">371</span><a name="line.371"></a>
-<span class="sourceLineNo">372</span>    // Seek all scanners to the initial key<a name="line.372"></a>
-<span class="sourceLineNo">373</span>    seekScanners(scanners, matcher.getStartKey(), false, parallelSeekEnabled);<a name="line.373"></a>
-<span class="sourceLineNo">374</span>    addCurrentScanners(scanners);<a name="line.374"></a>
-<span class="sourceLineNo">375</span>    resetKVHeap(scanners, scanInfo.getComparator());<a name="line.375"></a>
-<span class="sourceLineNo">376</span>  }<a name="line.376"></a>
-<span class="sourceLineNo">377</span><a name="line.377"></a>
-<span class="sourceLineNo">378</span>  /**<a name="line.378"></a>
-<span class="sourceLineNo">379</span>   * Get a filtered list of scanners. Assumes we are not in a compaction.<a name="line.379"></a>
-<span class="sourceLineNo">380</span>   * @return list of scanners to seek<a name="line.380"></a>
-<span class="sourceLineNo">381</span>   */<a name="line.381"></a>
-<span class="sourceLineNo">382</span>  private List&lt;KeyValueScanner&gt; getScannersNoCompaction() throws IOException {<a name="line.382"></a>
-<span class="sourceLineNo">383</span>    return selectScannersFrom(<a name="line.383"></a>
-<span class="sourceLineNo">384</span>      store.getScanners(cacheBlocks, scanUsePread, false, matcher, scan.getStartRow(),<a name="line.384"></a>
-<span class="sourceLineNo">385</span>        scan.includeStartRow(), scan.getStopRow(), scan.includeStopRow(), this.readPt));<a name="line.385"></a>
-<span class="sourceLineNo">386</span>  }<a name="line.386"></a>
-<span class="sourceLineNo">387</span><a name="line.387"></a>
-<span class="sourceLineNo">388</span>  /**<a name="line.388"></a>
-<span class="sourceLineNo">389</span>   * Seek the specified scanners with the given key<a name="line.389"></a>
-<span class="sourceLineNo">390</span>   * @param scanners<a name="line.390"></a>
-<span class="sourceLineNo">391</span>   * @param seekKey<a name="line.391"></a>
-<span class="sourceLineNo">392</span>   * @param isLazy true if using lazy seek<a name="line.392"></a>
-<span class="sourceLineNo">393</span>   * @param isParallelSeek true if using parallel seek<a name="line.393"></a>
-<span class="sourceLineNo">394</span>   * @throws IOException<a name="line.394"></a>
-<span class="sourceLineNo">395</span>   */<a name="line.395"></a>
-<span class="sourceLineNo">396</span>  protected void seekScanners(List&lt;? extends KeyValueScanner&gt; scanners,<a name="line.396"></a>
-<span class="sourceLineNo">397</span>      Cell seekKey, boolean isLazy, boolean isParallelSeek)<a name="line.397"></a>
-<span class="sourceLineNo">398</span>      throws IOException {<a name="line.398"></a>
-<span class="sourceLineNo">399</span>    // Seek all scanners to the start of the Row (or if the exact matching row<a name="line.399"></a>
-<span class="sourceLineNo">400</span>    // key does not exist, then to the start of the next matching Row).<a name="line.400"></a>
-<span class="sourceLineNo">401</span>    // Always check bloom filter to optimize the top row seek for delete<a name="line.401"></a>
-<span class="sourceLineNo">402</span>    // family marker.<a name="line.402"></a>
-<span class="sourceLineNo">403</span>    if (isLazy) {<a name="line.403"></a>
-<span class="sourceLineNo">404</span>      for (KeyValueScanner scanner : scanners) {<a name="line.404"></a>
-<span class="sourceLineNo">405</span>        scanner.requestSeek(seekKey, false, true);<a name="line.405"></a>
-<span class="sourceLineNo">406</span>      }<a name="line.406"></a>
-<span class="sourceLineNo">407</span>    } else {<a name="line.407"></a>
-<span class="sourceLineNo">408</span>      if (!isParallelSeek) {<a name="line.408"></a>
-<span class="sourceLineNo">409</span>        long totalScannersSoughtBytes = 0;<a name="line.409"></a>
-<span class="sourceLineNo">410</span>        for (KeyValueScanner scanner : scanners) {<a name="line.410"></a>
-<span class="sourceLineNo">411</span>          if (matcher.isUserScan() &amp;&amp; totalScannersSoughtBytes &gt;= maxRowSize) {<a name="line.411"></a>
-<span class="sourceLineNo">412</span>            throw new RowTooBigException("Max row size allowed: " + maxRowSize<a name="line.412"></a>
-<span class="sourceLineNo">413</span>              + ", but row is bigger than that");<a name="line.413"></a>
-<span class="sourceLineNo">414</span>          }<a name="line.414"></a>
-<span class="sourceLineNo">415</span>          scanner.seek(seekKey);<a name="line.415"></a>
-<span class="sourceLineNo">416</span>          Cell c = scanner.peek();<a name="line.416"></a>
-<span class="sourceLineNo">417</span>          if (c != null) {<a name="line.417"></a>
-<span class="sourceLineNo">418</span>            totalScannersSoughtBytes += CellUtil.estimatedSerializedSizeOf(c);<a name="line.418"></a>
-<span class="sourceLineNo">419</span>          }<a name="line.419"></a>
-<span class="sourceLineNo">420</span>        }<a name="line.420"></a>
-<span class="sourceLineNo">421</span>      } else {<a name="line.421"></a>
-<span class="sourceLineNo">422</span>        parallelSeek(scanners, seekKey);<a name="line.422"></a>
-<span class="sourceLineNo">423</span>      }<a name="line.423"></a>
-<span class="sourceLineNo">424</span>    }<a name="line.424"></a>
-<span class="sourceLineNo">425</span>  }<a name="line.425"></a>
-<span class="sourceLineNo">426</span><a name="line.426"></a>
-<span class="sourceLineNo">427</span>  protected void resetKVHeap(List&lt;? extends KeyValueScanner&gt; scanners,<a name="line.427"></a>
-<span class="sourceLineNo">428</span>      CellComparator comparator) throws IOException {<a name="line.428"></a>
-<span class="sourceLineNo">429</span>    // Combine all seeked scanners with a heap<a name="line.429"></a>
-<span class="sourceLineNo">430</span>    heap = new KeyValueHeap(scanners, comparator);<a name="line.430"></a>
-<span class="sourceLineNo">431</span>  }<a name="line.431"></a>
-<span class="sourceLineNo">432</span><a name="line.432"></a>
-<span class="sourceLineNo">433</span>  /**<a name="line.433"></a>
-<span class="sourceLineNo">434</span>   * Filters the given list of scanners using Bloom filter, time range, and<a name="line.434"></a>
-<span class="sourceLineNo">435</span>   * TTL.<a name="line.435"></a>
-<span class="sourceLineNo">436</span>   * &lt;p&gt;<a name="line.436"></a>
-<span class="sourceLineNo">437</span>   * Will be overridden by testcase so declared as protected.<a name="line.437"></a>
-<span class="sourceLineNo">438</span>   */<a name="line.438"></a>
-<span class="sourceLineNo">439</span>  @VisibleForTesting<a name="line.439"></a>
-<span class="sourceLineNo">440</span>  protected List&lt;KeyValueScanner&gt; selectScannersFrom(<a name="line.440"></a>
-<span class="sourceLineNo">441</span>      final List&lt;? extends KeyValueScanner&gt; allScanners) {<a name="line.441"></a>
-<span class="sourceLineNo">442</span>    boolean memOnly;<a name="line.442"></a>
-<span class="sourceLineNo">443</span>    boolean filesOnly;<a name="line.443"></a>
-<span class="sourceLineNo">444</span>    if (scan instanceof InternalScan) {<a name="line.444"></a>
-<span class="sourceLineNo">445</span>      InternalScan iscan = (InternalScan)scan;<a name="line.445"></a>
-<span class="sourceLineNo">446</span>      memOnly = iscan.isCheckOnlyMemStore();<a name="line.446"></a>
-<span class="sourceLineNo">447</span>      filesOnly = iscan.isCheckOnlyStoreFiles();<a name="line.447"></a>
-<span class="sourceLineNo">448</span>    } else {<a name="line.448"></a>
-<span class="sourceLineNo">449</span>      memOnly = false;<a name="line.449"></a>
-<span class="sourceLineNo">450</span>      filesOnly = false;<a name="line.450"></a>
-<span class="sourceLineNo">451</span>    }<a name="line.451"></a>
-<span class="sourceLineNo">452</span><a name="line.452"></a>
-<span class="sourceLineNo">453</span>    List&lt;KeyValueScanner&gt; scanners = new ArrayList&lt;&gt;(allScanners.size());<a name="line.453"></a>
-<span class="sourceLineNo">454</span><a name="line.454"></a>
-<span class="sourceLineNo">455</span>    // We can only exclude store files based on TTL if minVersions is set to 0.<a name="line.455"></a>
-<span class="sourceLineNo">456</span>    // Otherwise, we might have to return KVs that have technically expired.<a name="line.456"></a>
-<span class="sourceLineNo">457</span>    long expiredTimestampCutoff = minVersions == 0 ? oldestUnexpiredTS: Long.MIN_VALUE;<a name="line.457"></a>
-<span class="sourceLineNo">458</span><a name="line.458"></a>
-<span class="sourceLineNo">459</span>    // include only those scan files which pass all filters<a name="line.459"></a>
-<span class="sourceLineNo">460</span>    for (KeyValueScanner kvs : allScanners) {<a name="line.460"></a>
-<span class="sourceLineNo">461</span>      boolean isFile = kvs.isFileScanner();<a name="line.461"></a>
-<span class="sourceLineNo">462</span>      if ((!isFile &amp;&amp; filesOnly) || (isFile &amp;&amp; memOnly)) {<a name="line.462"></a>
-<span class="sourceLineNo">463</span>        continue;<a name="line.463"></a>
-<span class="sourceLineNo">464</span>      }<a name="line.464"></a>
-<span class="sourceLineNo">465</span><a name="line.465"></a>
-<span class="sourceLineNo">466</span>      if (kvs.shouldUseScanner(scan, store, expiredTimestampCutoff)) {<a name="line.466"></a>
-<span class="sourceLineNo">467</span>        scanners.add(kvs);<a name="line.467"></a>
-<span class="sourceLineNo">468</span>      } else {<a name="line.468"></a>
-<span class="sourceLineNo">469</span>        kvs.close();<a name="line.469"></a>
-<span class="sourceLineNo">470</span>      }<a name="line.470"></a>
-<span class="sourceLineNo">471</span>    }<a name="line.471"></a>
-<span class="sourceLineNo">472</span>    return scanners;<a name="line.472"></a>
-<span class="sourceLineNo">473</span>  }<a name="line.473"></a>
+<span class="sourceLineNo">193</span>    } else if(scanType != scanType.USER_SCAN) {<a name="line.193"></a>
+<span class="sourceLineNo">194</span>      // For compaction scanners never use Pread as already we have stream based scanners on the<a name="line.194"></a>
+<span class="sourceLineNo">195</span>      // store files to be compacted<a name="line.195"></a>
+<span class="sourceLineNo">196</span>      this.readType = Scan.ReadType.STREAM;<a name="line.196"></a>
+<span class="sourceLineNo">197</span>      this.scanUsePread = false;<a name="line.197"></a>
+<span class="sourceLineNo">198</span>    } else {<a name="line.198"></a>
+<span class="sourceLineNo">199</span>      if (scan.getReadType() == Scan.ReadType.DEFAULT) {<a name="line.199"></a>
+<span class="sourceLineNo">200</span>        this.readType = scanInfo.isUsePread() ? Scan.ReadType.PREAD : Scan.ReadType.DEFAULT;<a name="line.200"></a>
+<span class="sourceLineNo">201</span>      } else {<a name="line.201"></a>
+<span class="sourceLineNo">202</span>        this.readType = scan.getReadType();<a name="line.202"></a>
+<span class="sourceLineNo">203</span>      }<a name="line.203"></a>
+<span class="sourceLineNo">204</span>      // Always start with pread unless user specific stream. Will change to stream later if<a name="line.204"></a>
+<span class="sourceLineNo">205</span>      // readType is default if the scan keeps running for a long time.<a name="line.205"></a>
+<span class="sourceLineNo">206</span>      this.scanUsePread = this.readType != Scan.ReadType.STREAM;<a name="line.206"></a>
+<span class="sourceLineNo">207</span>    }<a name="line.207"></a>
+<span class="sourceLineNo">208</span>    this.preadMaxBytes = scanInfo.getPreadMaxBytes();<a name="line.208"></a>
+<span class="sourceLineNo">209</span>    this.cellsPerHeartbeatCheck = scanInfo.getCellsPerTimeoutCheck();<a name="line.209"></a>
+<span class="sourceLineNo">210</span>    // Parallel seeking is on if the config allows and more there is more than one store file.<a name="line.210"></a>
+<span class="sourceLineNo">211</span>    if (this.store != null &amp;&amp; this.store.getStorefilesCount() &gt; 1) {<a name="line.211"></a>
+<span class="sourceLineNo">212</span>      RegionServerServices rsService = ((HStore) store).getHRegion().getRegionServerServices();<a name="line.212"></a>
+<span class="sourceLineNo">213</span>      if (rsService != null &amp;&amp; scanInfo.isParallelSeekEnabled()) {<a name="line.213"></a>
+<span class="sourceLineNo">214</span>        this.parallelSeekEnabled = true;<a name="line.214"></a>
+<span class="sourceLineNo">215</span>        this.executor = rsService.getExecutorService();<a name="line.215"></a>
+<span class="sourceLineNo">216</span>      }<a name="line.216"></a>
+<span class="sourceLineNo">217</span>    }<a name="line.217"></a>
+<span class="sourceLineNo">218</span>  }<a name="line.218"></a>
+<span class="sourceLineNo">219</span><a name="line.219"></a>
+<span class="sourceLineNo">220</span>  private void addCurrentScanners(List&lt;? extends KeyValueScanner&gt; scanners) {<a name="line.220"></a>
+<span class="sourceLineNo">221</span>    this.currentScanners.addAll(scanners);<a name="line.221"></a>
+<span class="sourceLineNo">222</span>  }<a name="line.222"></a>
+<span class="sourceLineNo">223</span><a name="line.223"></a>
+<span class="sourceLineNo">224</span>  /**<a name="line.224"></a>
+<span class="sourceLineNo">225</span>   * Opens a scanner across memstore, snapshot, and all StoreFiles. Assumes we<a name="line.225"></a>
+<span class="sourceLineNo">226</span>   * are not in a compaction.<a name="line.226"></a>
+<span class="sourceLineNo">227</span>   *<a name="line.227"></a>
+<span class="sourceLineNo">228</span>   * @param store who we scan<a name="line.228"></a>
+<span class="sourceLineNo">229</span>   * @param scan the spec<a name="line.229"></a>
+<span class="sourceLineNo">230</span>   * @param columns which columns we are scanning<a name="line.230"></a>
+<span class="sourceLineNo">231</span>   * @throws IOException<a name="line.231"></a>
+<span class="sourceLineNo">232</span>   */<a name="line.232"></a>
+<span class="sourceLineNo">233</span>  public StoreScanner(Store store, ScanInfo scanInfo, Scan scan, final NavigableSet&lt;byte[]&gt; columns,<a name="line.233"></a>
+<span class="sourceLineNo">234</span>      long readPt)<a name="line.234"></a>
+<span class="sourceLineNo">235</span>  throws IOException {<a name="line.235"></a>
+<span class="sourceLineNo">236</span>    this(store, scan, scanInfo, columns, readPt, scan.getCacheBlocks(), ScanType.USER_SCAN);<a name="line.236"></a>
+<span class="sourceLineNo">237</span>    if (columns != null &amp;&amp; scan.isRaw()) {<a name="line.237"></a>
+<span class="sourceLineNo">238</span>      throw new DoNotRetryIOException("Cannot specify any column for a raw scan");<a name="line.238"></a>
+<span class="sourceLineNo">239</span>    }<a name="line.239"></a>
+<span class="sourceLineNo">240</span>    matcher = UserScanQueryMatcher.create(scan, scanInfo, columns, oldestUnexpiredTS, now,<a name="line.240"></a>
+<span class="sourceLineNo">241</span>      store.getCoprocessorHost());<a name="line.241"></a>
+<span class="sourceLineNo">242</span><a name="line.242"></a>
+<span class="sourceLineNo">243</span>    this.store.addChangedReaderObserver(this);<a name="line.243"></a>
+<span class="sourceLineNo">244</span><a name="line.244"></a>
+<span class="sourceLineNo">245</span>    try {<a name="line.245"></a>
+<span class="sourceLineNo">246</span>      // Pass columns to try to filter out unnecessary StoreFiles.<a name="line.246"></a>
+<span class="sourceLineNo">247</span>      List&lt;KeyValueScanner&gt; scanners = getScannersNoCompaction();<a name="line.247"></a>
+<span class="sourceLineNo">248</span><a name="line.248"></a>
+<span class="sourceLineNo">249</span>      // Seek all scanners to the start of the Row (or if the exact matching row<a name="line.249"></a>
+<span class="sourceLineNo">250</span>      // key does not exist, then to the start of the next matching Row).<a name="line.250"></a>
+<span class="sourceLineNo">251</span>      // Always check bloom filter to optimize the top row seek for delete<a name="line.251"></a>
+<span class="sourceLineNo">252</span>      // family marker.<a name="line.252"></a>
+<span class="sourceLineNo">253</span>      seekScanners(scanners, matcher.getStartKey(), explicitColumnQuery &amp;&amp; lazySeekEnabledGlobally,<a name="line.253"></a>
+<span class="sourceLineNo">254</span>        parallelSeekEnabled);<a name="line.254"></a>
+<span class="sourceLineNo">255</span><a name="line.255"></a>
+<span class="sourceLineNo">256</span>      // set storeLimit<a name="line.256"></a>
+<span class="sourceLineNo">257</span>      this.storeLimit = scan.getMaxResultsPerColumnFamily();<a name="line.257"></a>
+<span class="sourceLineNo">258</span><a name="line.258"></a>
+<span class="sourceLineNo">259</span>      // set rowOffset<a name="line.259"></a>
+<span class="sourceLineNo">260</span>      this.storeOffset = scan.getRowOffsetPerColumnFamily();<a name="line.260"></a>
+<span class="sourceLineNo">261</span>      addCurrentScanners(scanners);<a name="line.261"></a>
+<span class="sourceLineNo">262</span>      // Combine all seeked scanners with a heap<a name="line.262"></a>
+<span class="sourceLineNo">263</span>      resetKVHeap(scanners, store.getComparator());<a name="line.263"></a>
+<span class="sourceLineNo">264</span>    } catch (IOException e) {<a name="line.264"></a>
+<span class="sourceLineNo">265</span>      // remove us from the HStore#changedReaderObservers here or we'll have no chance to<a name="line.265"></a>
+<span class="sourceLineNo">266</span>      // and might cause memory leak<a name="line.266"></a>
+<span class="sourceLineNo">267</span>      this.store.deleteChangedReaderObserver(this);<a name="line.267"></a>
+<span class="sourceLineNo">268</span>      throw e;<a name="line.268"></a>
+<span class="sourceLineNo">269</span>    }<a name="line.269"></a>
+<span class="sourceLineNo">270</span>  }<a name="line.270"></a>
+<span class="sourceLineNo">271</span><a name="line.271"></a>
+<span class="sourceLineNo">272</span>  /**<a name="line.272"></a>
+<span class="sourceLineNo">273</span>   * Used for compactions.&lt;p&gt;<a name="line.273"></a>
+<span class="sourceLineNo">274</span>   *<a name="line.274"></a>
+<span class="sourceLineNo">275</span>   * Opens a scanner across specified StoreFiles.<a name="line.275"></a>
+<span class="sourceLineNo">276</span>   * @param store who we scan<a name="line.276"></a>
+<span class="sourceLineNo">277</span>   * @param scan the spec<a name="line.277"></a>
+<span class="sourceLineNo">278</span>   * @param scanners ancillary scanners<a name="line.278"></a>
+<span class="sourceLineNo">279</span>   * @param smallestReadPoint the readPoint that we should use for tracking<a name="line.279"></a>
+<span class="sourceLineNo">280</span>   *          versions<a name="line.280"></a>
+<span class="sourceLineNo">281</span>   */<a name="line.281"></a>
+<span class="sourceLineNo">282</span>  public StoreScanner(Store store, ScanInfo scanInfo, Scan scan,<a name="line.282"></a>
+<span class="sourceLineNo">283</span>      List&lt;? extends KeyValueScanner&gt; scanners, ScanType scanType,<a name="line.283"></a>
+<span class="sourceLineNo">284</span>      long smallestReadPoint, long earliestPutTs) throws IOException {<a name="line.284"></a>
+<span class="sourceLineNo">285</span>    this(store, scanInfo, scan, scanners, scanType, smallestReadPoint, earliestPutTs, null, null);<a name="line.285"></a>
+<span class="sourceLineNo">286</span>  }<a name="line.286"></a>
+<span class="sourceLineNo">287</span><a name="line.287"></a>
+<span class="sourceLineNo">288</span>  /**<a name="line.288"></a>
+<span class="sourceLineNo">289</span>   * Used for compactions that drop deletes from a limited range of rows.&lt;p&gt;<a name="line.289"></a>
+<span class="sourceLineNo">290</span>   *<a name="line.290"></a>
+<span class="sourceLineNo">291</span>   * Opens a scanner across specified StoreFiles.<a name="line.291"></a>
+<span class="sourceLineNo">292</span>   * @param store who we scan<a name="line.292"></a>
+<span class="sourceLineNo">293</span>   * @param scan the spec<a name="line.293"></a>
+<span class="sourceLineNo">294</span>   * @param scanners ancillary scanners<a name="line.294"></a>
+<span class="sourceLineNo">295</span>   * @param smallestReadPoint the readPoint that we should use for tracking versions<a name="line.295"></a>
+<span class="sourceLineNo">296</span>   * @param dropDeletesFromRow The inclusive left bound of the range; can be EMPTY_START_ROW.<a name="line.296"></a>
+<span class="sourceLineNo">297</span>   * @param dropDeletesToRow The exclusive right bound of the range; can be EMPTY_END_ROW.<a name="line.297"></a>
+<span class="sourceLineNo">298</span>   */<a name="line.298"></a>
+<span class="sourceLineNo">299</span>  public StoreScanner(Store store, ScanInfo scanInfo, Scan scan,<a name="line.299"></a>
+<span class="sourceLineNo">300</span>      List&lt;? extends KeyValueScanner&gt; scanners, long smallestReadPoint, long earliestPutTs,<a name="line.300"></a>
+<span class="sourceLineNo">301</span>      byte[] dropDeletesFromRow, byte[] dropDeletesToRow) throws IOException {<a name="line.301"></a>
+<span class="sourceLineNo">302</span>    this(store, scanInfo, scan, scanners, ScanType.COMPACT_RETAIN_DELETES, smallestReadPoint,<a name="line.302"></a>
+<span class="sourceLineNo">303</span>        earliestPutTs, dropDeletesFromRow, dropDeletesToRow);<a name="line.303"></a>
+<span class="sourceLineNo">304</span>  }<a name="line.304"></a>
+<span class="sourceLineNo">305</span><a name="line.305"></a>
+<span class="sourceLineNo">306</span>  private StoreScanner(Store store, ScanInfo scanInfo, Scan scan,<a name="line.306"></a>
+<span class="sourceLineNo">307</span>      List&lt;? extends KeyValueScanner&gt; scanners, ScanType scanType, long smallestReadPoint,<a name="line.307"></a>
+<span class="sourceLineNo">308</span>      long earliestPutTs, byte[] dropDeletesFromRow, byte[] dropDeletesToRow) throws IOException {<a name="line.308"></a>
+<span class="sourceLineNo">309</span>    this(store, scan, scanInfo, null,<a name="line.309"></a>
+<span class="sourceLineNo">310</span>        ((HStore) store).getHRegion().getReadPoint(IsolationLevel.READ_COMMITTED), false, scanType);<a name="line.310"></a>
+<span class="sourceLineNo">311</span>    if (scan.hasFilter() || (scan.getStartRow() != null &amp;&amp; scan.getStartRow().length &gt; 0)<a name="line.311"></a>
+<span class="sourceLineNo">312</span>        || (scan.getStopRow() != null &amp;&amp; scan.getStopRow().length &gt; 0)<a name="line.312"></a>
+<span class="sourceLineNo">313</span>        || !scan.getTimeRange().isAllTime()) {<a name="line.313"></a>
+<span class="sourceLineNo">314</span>      // use legacy query matcher since we do not consider the scan object in our code. Only used to<a name="line.314"></a>
+<span class="sourceLineNo">315</span>      // keep compatibility for coprocessor.<a name="line.315"></a>
+<span class="sourceLineNo">316</span>      matcher = LegacyScanQueryMatcher.create(scan, scanInfo, null, scanType, smallestReadPoint,<a name="line.316"></a>
+<span class="sourceLineNo">317</span>        earliestPutTs, oldestUnexpiredTS, now, dropDeletesFromRow, dropDeletesToRow,<a name="line.317"></a>
+<span class="sourceLineNo">318</span>        store.getCoprocessorHost());<a name="line.318"></a>
+<span class="sourceLineNo">319</span>    } else {<a name="line.319"></a>
+<span class="sourceLineNo">320</span>      matcher = CompactionScanQueryMatcher.create(scanInfo, scanType, smallestReadPoint,<a name="line.320"></a>
+<span class="sourceLineNo">321</span>        earliestPutTs, oldestUnexpiredTS, now, dropDeletesFromRow, dropDeletesToRow,<a name="line.321"></a>
+<span class="sourceLineNo">322</span>        store.getCoprocessorHost());<a name="line.322"></a>
+<span class="sourceLineNo">323</span>    }<a name="line.323"></a>
+<span class="sourceLineNo">324</span><a name="line.324"></a>
+<span class="sourceLineNo">325</span>    // Filter the list of scanners using Bloom filters, time range, TTL, etc.<a name="line.325"></a>
+<span class="sourceLineNo">326</span>    scanners = selectScannersFrom(scanners);<a name="line.326"></a>
+<span class="sourceLineNo">327</span><a name="line.327"></a>
+<span class="sourceLineNo">328</span>    // Seek all scanners to the initial key<a name="line.328"></a>
+<span class="sourceLineNo">329</span>    seekScanners(scanners, matcher.getStartKey(), false, parallelSeekEnabled);<a name="line.329"></a>
+<span class="sourceLineNo">330</span>    addCurrentScanners(scanners);<a name="line.330"></a>
+<span class="sourceLineNo">331</span>    // Combine all seeked scanners with a heap<a name="line.331"></a>
+<span class="sourceLineNo">332</span>    resetKVHeap(scanners, store.getComparator());<a name="line.332"></a>
+<span class="sourceLineNo">333</span>  }<a name="line.333"></a>
+<span class="sourceLineNo">334</span><a name="line.334"></a>
+<span class="sourceLineNo">335</span>  @VisibleForTesting<a name="line.335"></a>
+<span class="sourceLineNo">336</span>  StoreScanner(final Scan scan, ScanInfo scanInfo,<a name="line.336"></a>
+<span class="sourceLineNo">337</span>      ScanType scanType, final NavigableSet&lt;byte[]&gt; columns,<a name="line.337"></a>
+<span class="sourceLineNo">338</span>      final List&lt;? extends KeyValueScanner&gt; scanners) throws IOException {<a name="line.338"></a>
+<span class="sourceLineNo">339</span>    this(scan, scanInfo, scanType, columns, scanners,<a name="line.339"></a>
+<span class="sourceLineNo">340</span>        HConstants.LATEST_TIMESTAMP,<a name="line.340"></a>
+<span class="sourceLineNo">341</span>        // 0 is passed as readpoint because the test bypasses Store<a name="line.341"></a>
+<span class="sourceLineNo">342</span>        0);<a name="line.342"></a>
+<span class="sourceLineNo">343</span>  }<a name="line.343"></a>
+<span class="sourceLineNo">344</span><a name="line.344"></a>
+<span class="sourceLineNo">345</span>  @VisibleForTesting<a name="line.345"></a>
+<span class="sourceLineNo">346</span>  StoreScanner(final Scan scan, ScanInfo scanInfo,<a name="line.346"></a>
+<span class="sourceLineNo">347</span>    ScanType scanType, final NavigableSet&lt;byte[]&gt; columns,<a name="line.347"></a>
+<span class="sourceLineNo">348</span>    final List&lt;? extends KeyValueScanner&gt; scanners, long earliestPutTs)<a name="line.348"></a>
+<span class="sourceLineNo">349</span>        throws IOException {<a name="line.349"></a>
+<span class="sourceLineNo">350</span>    this(scan, scanInfo, scanType, columns, scanners, earliestPutTs,<a name="line.350"></a>
+<span class="sourceLineNo">351</span>      // 0 is passed as readpoint because the test bypasses Store<a name="line.351"></a>
+<span class="sourceLineNo">352</span>      0);<a name="line.352"></a>
+<span class="sourceLineNo">353</span>  }<a name="line.353"></a>
+<span class="sourceLineNo">354</span><a name="line.354"></a>
+<span class="sourceLineNo">355</span>  public StoreScanner(final Scan scan, ScanInfo scanInfo, ScanType scanType,<a name="line.355"></a>
+<span class="sourceLineNo">356</span>      final NavigableSet&lt;byte[]&gt; columns, final List&lt;? extends KeyValueScanner&gt; scanners, long earliestPutTs,<a name="line.356"></a>
+<span class="sourceLineNo">357</span>      long readPt) throws IOException {<a name="line.357"></a>
+<span class="sourceLineNo">358</span>    this(null, scan, scanInfo, columns, readPt,<a name="line.358"></a>
+<span class="sourceLineNo">359</span>        scanType == ScanType.USER_SCAN ? scan.getCacheBlocks() : false, scanType);<a name="line.359"></a>
+<span class="sourceLineNo">360</span>    if (scanType == ScanType.USER_SCAN) {<a name="line.360"></a>
+<span class="sourceLineNo">361</span>      this.matcher = UserScanQueryMatcher.create(scan, scanInfo, columns, oldestUnexpiredTS, now,<a name="line.361"></a>
+<span class="sourceLineNo">362</span>        null);<a name="line.362"></a>
+<span class="sourceLineNo">363</span>    } else {<a name="line.363"></a>
+<span class="sourceLineNo">364</span>      if (scan.hasFilter() || (scan.getStartRow() != null &amp;&amp; scan.getStartRow().length &gt; 0)<a name="line.364"></a>
+<span class="sourceLineNo">365</span>          || (scan.getStopRow() != null &amp;&amp; scan.getStopRow().length &gt; 0)<a name="line.365"></a>
+<span class="sourceLineNo">366</span>          || !scan.getTimeRange().isAllTime() || columns != null) {<a name="line.366"></a>
+<span class="sourceLineNo">367</span>        // use legacy query matcher since we do not consider the scan object in our code. Only used<a name="line.367"></a>
+<span class="sourceLineNo">368</span>        // to keep compatibility for coprocessor.<a name="line.368"></a>
+<span class="sourceLineNo">369</span>        matcher = LegacyScanQueryMatcher.create(scan, scanInfo, columns, scanType, Long.MAX_VALUE,<a name="line.369"></a>
+<span class="sourceLineNo">370</span>          earliestPutTs, oldestUnexpiredTS, now, null, null, store.getCoprocessorHost());<a name="line.370"></a>
+<span class="sourceLineNo">371</span>      } else {<a name="line.371"></a>
+<span class="sourceLineNo">372</span>        this.matcher = CompactionScanQueryMatcher.create(scanInfo, scanType, Long.MAX_VALUE,<a name="line.372"></a>
+<span class="sourceLineNo">373</span>          earliestPutTs, oldestUnexpiredTS, now, null, null, null);<a name="line.373"></a>
+<span class="sourceLineNo">374</span>      }<a name="line.374"></a>
+<span class="sourceLineNo">375</span>    }<a name="line.375"></a>
+<span class="sourceLineNo">376</span><a name="line.376"></a>
+<span class="sourceLineNo">377</span>    // Seek all scanners to the initial key<a name="line.377"></a>
+<span class="sourceLineNo">378</span>    seekScanners(scanners, matcher.getStartKey(), false, parallelSeekEnabled);<a name="line.378"></a>
+<span class="sourceLineNo">379</span>    addCurrentScanners(scanners);<a name="line.379"></a>
+<span class="sourceLineNo">380</span>    resetKVHeap(scanners, scanInfo.getComparator());<a name="line.380"></a>
+<span class="sourceLineNo">381</span>  }<a name="line.381"></a>
+<span class="sourceLineNo">382</span><a name="line.382"></a>
+<span class="sourceLineNo">383</span>  /**<a name="line.383"></a>
+<span class="sourceLineNo">384</span>   * Get a filtered list of scanners. Assumes we are not in a compaction.<a name="line.384"></a>
+<span class="sourceLineNo">385</span>   * @return list of scanners to seek<a name="line.385"></a>
+<span class="sourceLineNo">386</span>   */<a name="line.386"></a>
+<span class="sourceLineNo">387</span>  private List&lt;KeyValueScanner&gt; getScannersNoCompaction() throws IOException {<a name="line.387"></a>
+<span class="sourceLineNo">388</span>    return selectScannersFrom(<a name="line.388"></a>
+<span class="sourceLineNo">389</span>      store.getScanners(cacheBlocks, scanUsePread, false, matcher, scan.getStartRow(),<a name="line.389"></a>
+<span class="sourceLineNo">390</span>        scan.includeStartRow(), scan.getStopRow(), scan.includeStopRow(), this.readPt));<a name="line.390"></a>
+<span class="sourceLineNo">391</span>  }<a name="line.391"></a>
+<span class="sourceLineNo">392</span><a name="line.392"></a>
+<span class="sourceLineNo">393</span>  @VisibleForTesting<a name="line.393"></a>
+<span class="sourceLineNo">394</span>  boolean isScanUsePread() {<a name="line.394"></a>
+<span class="sourceLineNo">395</span>    return this.scanUsePread;<a name="line.395"></a>
+<span class="sourceLineNo">396</span>  }<a name="line.396"></a>
+<span class="sourceLineNo">397</span>  /**<a name="line.397"></a>
+<span class="sourceLineNo">398</span>   * Seek the specified scanners with the given key<a name="line.398"></a>
+<span class="sourceLineNo">399</span>   * @param scanners<a name="line.399"></a>
+<span class="sourceLineNo">400</span>   * @param seekKey<a name="line.400"></a>
+<span class="sourceLineNo">401</span>   * @param isLazy true if using lazy seek<a name="line.401"></a>
+<span class="sourceLineNo">402</span>   * @param isParallelSeek true if using parallel seek<a name="line.402"></a>
+<span class="sourceLineNo">403</span>   * @throws IOException<a name="line.403"></a>
+<span class="sourceLineNo">404</span>   */<a name="line.404"></a>
+<span class="sourceLineNo">405</span>  protected void seekScanners(List&lt;? extends KeyValueScanner&gt; scanners,<a name="line.405"></a>
+<span class="sourceLineNo">406</span>      Cell seekKey, boolean isLazy, boolean isParallelSeek)<a name="line.406"></a>
+<span class="sourceLineNo">407</span>      throws IOException {<a name="line.407"></a>
+<span class="sourceLineNo">408</span>    // Seek all scanners to the start of the Row (or if the exact matching row<a name="line.408"></a>
+<span class="sourceLineNo">409</span>    // key does not exist, then to the start of the next matching Row).<a name="line.409"></a>
+<span class="sourceLineNo">410</span>    // Always check bloom filter to optimize the top row seek for delete<a name="line.410"></a>
+<span class="sourceLineNo">411</span>    // family marker.<a name="line.411"></a>
+<span class="sourceLineNo">412</span>    if (isLazy) {<a name="line.412"></a>
+<span class="sourceLineNo">413</span>      for (KeyValueScanner scanner : scanners) {<a name="line.413"></a>
+<span class="sourceLineNo">414</span>        scanner.requestSeek(seekKey, false, true);<a name="line.414"></a>
+<span class="sourceLineNo">415</span>      }<a name="line.415"></a>
+<span class="sourceLineNo">416</span>    } else {<a name="line.416"></a>
+<span class="sourceLineNo">417</span>      if (!isParallelSeek) {<a name="line.417"></a>
+<span class="sourceLineNo">418</span>        long totalScannersSoughtBytes = 0;<a name="line.418"></a>
+<span class="sourceLineNo">419</span>        for (KeyValueScanner scanner : scanners) {<a name="line.419"></a>
+<span class="sourceLineNo">420</span>          if (matcher.isUserScan() &amp;&amp; totalScannersSoughtBytes &gt;= maxRowSize) {<a name="line.420"></a>
+<span class="sourceLineNo">421</span>            throw new RowTooBigException("Max row size allowed: " + maxRowSize<a name="line.421"></a>
+<span class="sourceLineNo">422</span>              + ", but row is bigger than that");<a name="line.422"></a>
+<span class="sourceLineNo">423</span>          }<a name="line.423"></a>
+<span class="sourceLineNo">424</span>          scanner.seek(seekKey);<a name="line.424"></a>
+<span class="sourceLineNo">425</span>          Cell c = scanner.peek();<a name="line.425"></a>
+<span class="sourceLineNo">426</span>          if (c != null) {<a name="line.426"></a>
+<span class="sourceLineNo">427</span>            totalScannersSoughtBytes += CellUtil.estimatedSerializedSizeOf(c);<a name="line.427"></a>
+<span class="sourceLineNo">428</span>          }<a name="line.428"></a>
+<span class="sourceLineNo">429</span>        }<a name="line.429"></a>
+<span class="sourceLineNo">430</span>      } else {<a name="line.430"></a>
+<span class="sourceLineNo">431</span>        parallelSeek(scanners, seekKey);<a name="line.431"></a>
+<span class="sourceLineNo">432</span>      }<a name="line.432"></a>
+<span class="sourceLineNo">433</span>    }<a name="line.433"></a>
+<span class="sourceLineNo">434</span>  }<a name="line.434"></a>
+<span class="sourceLineNo">435</span><a name="line.435"></a>
+<span class="sourceLineNo">436</span>  protected void resetKVHeap(List&lt;? extends KeyValueScanner&gt; scanners,<a name="line.436"></a>
+<span class="sourceLineNo">437</span>      CellComparator comparator) throws IOException {<a name="line.437"></a>
+<span class="sourceLineNo">438</span>    // Combine all seeked scanners with a heap<a name="line.438"></a>
+<span class="sourceLineNo">439</span>    heap = new KeyValueHeap(scanners, comparator);<a name="line.439"></a>
+<span class="sourceLineNo">440</span>  }<a name="line.440"></a>
+<span class="sourceLineNo">441</span><a name="line.441"></a>
+<span class="sourceLineNo">442</span>  /**<a name="line.442"></a>
+<span class="sourceLineNo">443</span>   * Filters the given list of scanners using Bloom filter, time range, and<a name="line.443"></a>
+<span class="sourceLineNo">444</span>   * TTL.<a name="line.444"></a>
+<span class="sourceLineNo">445</span>   * &lt;p&gt;<a name="line.445"></a>
+<span class="sourceLineNo">446</span>   * Will be overridden by testcase so declared as protected.<a name="line.446"></a>
+<span class="sourceLineNo">447</span>   */<a name="line.447"></a>
+<span class="sourceLineNo">448</span>  @VisibleForTesting<a name="line.448"></a>
+<span class="sourceLineNo">449</span>  protected List&lt;KeyValueScanner&gt; selectScannersFrom(<a name="line.449"></a>
+<span class="sourceLineNo">450</span>      final List&lt;? extends KeyValueScanner&gt; allScanners) {<a name="line.450"></a>
+<span class="sourceLineNo">451</span>    boolean memOnly;<a name="line.451"></a>
+<span class="sourceLineNo">452</span>    boolean filesOnly;<a name="line.452"></a>
+<span class="sourceLineNo">453</span>    if (scan instanceof InternalScan) {<a name="line.453"></a>
+<span class="sourceLineNo">454</span>      InternalScan iscan = (InternalScan)scan;<a name="line.454"></a>
+<span class="sourceLineNo">455</span>      memOnly = iscan.isCheckOnlyMemStore();<a name="line.455"></a>
+<span class="sourceLineNo">456</span>      filesOnly = iscan.isCheckOnlyStoreFiles();<a name="line.456"></a>
+<span class="sourceLineNo">457</span>    } else {<a name="line.457"></a>
+<span class="sourceLineNo">458</span>      memOnly = false;<a name="line.458"></a>
+<span class="sourceLineNo">459</span>      filesOnly = false;<a name="line.459"></a>
+<span class="sourceLineNo">460</span>    }<a name="line.460"></a>
+<span class="sourceLineNo">461</span><a name="line.461"></a>
+<span class="sourceLineNo">462</span>    List&lt;KeyValueScanner&gt; scanners = new ArrayList&lt;&gt;(allScanners.size());<a name="line.462"></a>
+<span class="sourceLineNo">463</span><a name="line.463"></a>
+<span class="sourceLineNo">464</span>    // We can only exclude store files based on TTL if minVersions is set to 0.<a name="line.464"></a>
+<span class="sourceLineNo">465</span>    // Otherwise, we might have to return KVs that have technically expired.<a name="line.465"></a>
+<span class="sourceLineNo">466</span>    long expiredTimestampCutoff = minVersions == 0 ? oldestUnexpiredTS: Long.MIN_VALUE;<a name="line.466"></a>
+<span class="sourceLineNo">467</span><a name="line.467"></a>
+<span class="sourceLineNo">468</span>    // include only those scan files which pass all filters<a name="line.468"></a>
+<span class="sourceLineNo">469</span>    for (KeyValueScanner kvs : allScanners) {<a name="line.469"></a>
+<span class="sourceLineNo">470</span>      boolean isFile = kvs.isFileScanner();<a name="line.470"></a>
+<span class="sourceLineNo">471</span>      if ((!isFile &amp;&amp; filesOnly) || (isFile &amp;&amp; memOnly)) {<a name="line.471"></a>
+<span class="sourceLineNo">472</span>        continue;<a name="line.472"></a>
+<span class="sourceLineNo">473</span>      }<a name="line.473"></a>
 <span class="sourceLineNo">474</span><a name="line.474"></a>
-<span class="sourceLineNo">475</span>  @Override<a name="line.475"></a>
-<span class="sourceLineNo">476</span>  public Cell peek() {<a name="line.476"></a>
-<span class="sourceLineNo">477</span>    return heap != null ? heap.peek() : null;<a name="line.477"></a>
-<span class="sourceLineNo">478</span>  }<a name="line.478"></a>
-<span class="sourceLineNo">479</span><a name="line.479"></a>
-<span class="sourceLineNo">480</span>  @Override<a name="line.480"></a>
-<span class="sourceLineNo">481</span>  public KeyValue next() {<a name="line.481"></a>
-<span class="sourceLineNo">482</span>    // throw runtime exception perhaps?<a name="line.482"></a>
-<span class="sourceLineNo">483</span>    throw new RuntimeException("Never call StoreScanner.next()");<a name="line.483"></a>
-<span class="sourceLineNo">484</span>  }<a name="line.484"></a>
-<span class="sourceLineNo">485</span><a name="line.485"></a>
-<span class="sourceLineNo">486</span>  @Override<a name="line.486"></a>
-<span class="sourceLineNo">487</span>  public void close() {<a name="line.487"></a>
-<span class="sourceLineNo">488</span>    close(true);<a name="line.488"></a>
-<span class="sourceLineNo">489</span>  }<a name="line.489"></a>
-<span class="sourceLineNo">490</span><a name="line.490"></a>
-<span class="sourceLineNo">491</span>  private void close(boolean withDelayedScannersClose) {<a name="line.491"></a>
-<span class="sourceLineNo">492</span>    if (this.closing) {<a name="line.492"></a>
-<span class="sourceLineNo">493</span>      return;<a name="line.493"></a>
-<span class="sourceLineNo">494</span>    }<a name="line.494"></a>
-<span class="sourceLineNo">495</span>    if (withDelayedScannersClose) {<a name="line.495"></a>
-<span class="sourceLineNo">496</span>      this.closing = true;<a name="line.496"></a>
-<span class="sourceLineNo">497</span>    }<a name="line.497"></a>
-<span class="sourceLineNo">498</span>    // Under test, we dont have a this.store<a name="line.498"></a>
-<span class="sourceLineNo">499</span>    if (this.store != null) {<a name="line.499"></a>
-<span class="sourceLineNo">500</span>      this.store.deleteChangedReaderObserver(this);<a name="line.500"></a>
-<span class="sourceLineNo">501</span>    }<a name="line.501"></a>
-<span class="sourceLineNo">502</span>    if (withDelayedScannersClose) {<a name="line.502"></a>
-<span class="sourceLineNo">503</span>      clearAndClose(scannersForDelayedClose);<a name="line.503"></a>
-<span class="sourceLineNo">504</span>      clearAndClose(memStoreScannersAfterFlush);<a name="line.504"></a>
-<span class="sourceLineNo">505</span>      if (this.heap != null) {<a name="line.505"></a>
-<span class="sourceLineNo">506</span>        this.heap.close();<a name="line.506"></a>
-<span class="sourceLineNo">507</span>        this.currentScanners.clear();<a name="line.507"></a>
-<span class="sourceLineNo">508</span>        this.heap = null; // CLOSED!<a name="line.508"></a>
-<span class="sourceLineNo">509</span>      }<a name="line.509"></a>
-<span class="sourceLineNo">510</span>    } else {<a name="line.510"></a>
-<span class="sourceLineNo">511</span>      if (this.heap != null) {<a name="line.511"></a>
-<span class="sourceLineNo">512</span>        this.scannersForDelayedClose.add(this.heap);<a name="line.512"></a>
-<span class="sourceLineNo">513</span>        this.currentScanners.clear();<a name="line.513"></a>
-<span class="sourceLineNo">514</span>        this.heap = null;<a name="line.514"></a>
-<span class="sourceLineNo">515</span>      }<a name="line.515"></a>
-<span class="sourceLineNo">516</span>    }<a name="line.516"></a>
-<span class="sourceLineNo">517</span>  }<a name="line.517"></a>
-<span class="sourceLineNo">518</span><a name="line.518"></a>
-<span class="sourceLineNo">519</span>  @Override<a name="line.519"></a>
-<span class="sourceLineNo">520</span>  public boolean seek(Cell key) throws IOException {<a name="line.520"></a>
-<span class="sourceLineNo">521</span>    if (checkFlushed()) {<a name="line.521"></a>
-<span class="sourceLineNo">522</span>      reopenAfterFlush();<a name="line.522"></a>
-<span class="sourceLineNo">523</span>    }<a name="line.523"></a>
-<span class="sourceLineNo">524</span>    return this.heap.seek(key);<a name="line.524"></a>
-<span class="sourceLineNo">525</span>  }<a name="line.525"></a>
-<span class="sourceLineNo">526</span><a name="line.526"></a>
-<span class="sourceLineNo">527</span>  @Override<a name="line.527"></a>
-<span class="sourceLineNo">528</span>  public boolean next(List&lt;Cell&gt; outResult) throws IOException {<a name="line.528"></a>
-<span class="sourceLineNo">529</span>    return next(outResult, NoLimitScannerContext.getInstance());<a name="line.529"></a>
-<span class="sourceLineNo">530</span>  }<a name="line.530"></a>
-<span class="sourceLineNo">531</span><a name="line.531"></a>
-<span class="sourceLineNo">532</span>  /**<a name="line.532"></a>
-<span class="sourceLineNo">533</span>   * Get the next row of values from this Store.<a name="line.533"></a>
-<span class="sourceLineNo">534</span>   * @param outResult<a name="line.534"></a>
-<span class="sourceLineNo">535</span>   * @param scannerContext<a name="line.535"></a>
-<span class="sourceLineNo">536</span>   * @return true if there are more rows, false if scanner is done<a name="line.536"></a>
-<span class="sourceLineNo">537</span>   */<a name="line.537"></a>
-<span class="sourceLineNo">538</span>  @Override<a name="line.538"></a>
-<span class="sourceLineNo">539</span>  public boolean next(List&lt;Cell&gt; outResult, ScannerContext scannerContext) throws IOException {<a name="line.539"></a>
-<span class="sourceLineNo">540</span>    if (scannerContext == null) {<a name="line.540"></a>
-<span class="sourceLineNo">541</span>      throw new IllegalArgumentException("Scanner context cannot be null");<a name="line.541"></a>
-<span class="sourceLineNo">542</span>    }<a name="line.542"></a>
-<span class="sourceLineNo">543</span>    if (checkFlushed() &amp;&amp; reopenAfterFlush()) {<a name="line.543"></a>
-<span class="sourceLineNo">544</span>      return scannerContext.setScannerState(NextState.MORE_VALUES).hasMoreValues();<a name="line.544"></a>
-<span class="sourceLineNo">545</span>    }<a name="line.545"></a>
-<span class="sourceLineNo">546</span><a name="line.546"></a>
-<span class="sourceLineNo">547</span>    // if the heap was left null, then the scanners had previously run out anyways, close and<a name="line.547"></a>
-<span class="sourceLineNo">548</span>    // return.<a name="line.548"></a>
-<span class="sourceLineNo">549</span>    if (this.heap == null) {<a name="line.549"></a>
-<span class="sourceLineNo">550</span>      // By this time partial close should happened because already heap is null<a name="line.550"></a>
-<span class="sourceLineNo">551</span>      close(false);// Do all cleanup except heap.close()<a name="line.551"></a>
-<span class="sourceLineNo">552</span>      return scannerContext.setScannerState(NextState.NO_MORE_VALUES).hasMoreValues();<a name="line.552"></a>
-<span class="sourceLineNo">553</span>    }<a name="line.553"></a>
-<span class="sourceLineNo">554</span><a name="line.554"></a>
-<span class="sourceLineNo">555</span>    Cell cell = this.heap.peek();<a name="line.555"></a>
-<span class="sourceLineNo">556</span>    if (cell == null) {<a name="line.556"></a>
-<span class="sourceLineNo">557</span>      close(false);// Do all cleanup except heap.close()<a name="line.557"></a>
-<span class="sourceLineNo">558</span>      return scannerContext.setScannerState(NextState.NO_MORE_VALUES).hasMoreValues();<a name="line.558"></a>
-<span class="sourceLineNo">559</span>    }<a name="line.559"></a>
-<span class="sourceLineNo">560</span><a name="line.560"></a>
-<span class="sourceLineNo">561</span>    // only call setRow if the row changes; avoids confusing the query matcher<a name="line.561"></a>
-<span class="sourceLineNo">562</span>    // if scanning intra-row<a name="line.562"></a>
+<span class="sourceLineNo">475</span>      if (kvs.shouldUseScanner(scan, store, expiredTimestampCutoff)) {<a name="line.475"></a>
+<span class="sourceLineNo">476</span>        scanners.add(kvs);<a name="line.476"></a>
+<span class="sourceLineNo">477</span>      } else {<a name="line.477"></a>
+<span class="sourceLineNo">478</span>        kvs.close();<a name="line.478"></a>
+<span class="sourceLineNo">479</span>      }<a name="line.479"></a>
+<span class="sourceLineNo">480</span>    }<a name="line.480"></a>
+<span class="sourceLineNo">481</span>    return scanners;<a name="line.481"></a>
+<span class="sourceLineNo">482</span>  }<a name="line.482"></a>
+<span class="sourceLineNo">483</span><a name="line.483"></a>
+<span class="sourceLineNo">484</span>  @Override<a name="line.484"></a>
+<span class="sourceLineNo">485</span>  public Cell peek() {<a name="line.485"></a>
+<span class="sourceLineNo">486</span>    return heap != null ? heap.peek() : null;<a name="line.486"></a>
+<span class="sourceLineNo">487</span>  }<a name="line.487"></a>
+<span class="sourceLineNo">488</span><a name="line.488"></a>
+<span class="sourceLineNo">489</span>  @Override<a name="line.489"></a>
+<span class="sourceLineNo">490</span>  public KeyValue next() {<a name="line.490"></a>
+<span class="sourceLineNo">491</span>    // throw runtime exception perhaps?<a name="line.491"></a>
+<span class="sourceLineNo">492</span>    throw new RuntimeException("Never call StoreScanner.next()");<a name="line.492"></a>
+<span class="sourceLineNo">493</span>  }<a name="line.493"></a>
+<span class="sourceLineNo">494</span><a name="line.494"></a>
+<span class="sourceLineNo">495</span>  @Override<a name="line.495"></a>
+<span class="sourceLineNo">496</span>  public void close() {<a name="line.496"></a>
+<span class="sourceLineNo">497</span>    close(true);<a name="line.497"></a>
+<span class="sourceLineNo">498</span>  }<a name="line.498"></a>
+<span class="sourceLineNo">499</span><a name="line.499"></a>
+<span class="sourceLineNo">500</span>  private void close(boolean withDelayedScannersClose) {<a name="line.500"></a>
+<span class="sourceLineNo">501</span>    if (this.closing) {<a name="line.501"></a>
+<span class="sourceLineNo">502</span>      return;<a name="line.502"></a>
+<span class="sourceLineNo">503</span>    }<a name="line.503"></a>
+<span class="sourceLineNo">504</span>    if (withDelayedScannersClose) {<a name="line.504"></a>
+<span class="sourceLineNo">505</span>      this.closing = true;<a name="line.505"></a>
+<span class="sourceLineNo">506</span>    }<a name="line.506"></a>
+<span class="sourceLineNo">507</span>    // Under test, we dont have a this.store<a name="line.507"></a>
+<span class="sourceLineNo">508</span>    if (this.store != null) {<a name="line.508"></a>
+<span class="sourceLineNo">509</span>      this.store.deleteChangedReaderObserver(this);<a name="line.509"></a>
+<span class="sourceLineNo">510</span>    }<a name="line.510"></a>
+<span class="sourceLineNo">511</span>    if (withDelayedScannersClose) {<a name="line.511"></a>
+<span class="sourceLineNo">512</span>      clearAndClose(scannersForDelayedClose);<a name="line.512"></a>
+<span class="sourceLineNo">513</span>      clearAndClose(memStoreScannersAfterFlush);<a name="line.513"></a>
+<span class="sourceLineNo">514</span>      if (this.heap != null) {<a name="line.514"></a>
+<span class="sourceLineNo">515</span>        this.heap.close();<a name="line.515"></a>
+<span class="sourceLineNo">516</span>        this.currentScanners.clear();<a name="line.516"></a>
+<span class="sourceLineNo">517</span>        this.heap = null; // CLOSED!<a name="line.517"></a>
+<span class="sourceLineNo">518</span>      }<a name="line.518"></a>
+<span class="sourceLineNo">519</span>    } else {<a name="line.519"></a>
+<span class="sourceLineNo">520</span>      if (this.heap != null) {<a name="line.520"></a>
+<span class="sourceLineNo">521</span>        this.scannersForDelayedClose.add(this.heap);<a name="line.521"></a>
+<span class="sourceLineNo">522</span>        this.currentScanners.clear();<a name="line.522"></a>
+<span class="sourceLineNo">523</span>        this.heap = null;<a name="line.523"></a>
+<span class="sourceLineNo">524</span>      }<a name="line.524"></a>
+<span class="sourceLineNo">525</span>    }<a name="line.525"></a>
+<span class="sourceLineNo">526</span>  }<a name="line.526"></a>
+<span class="sourceLineNo">527</span><a name="line.527"></a>
+<span class="sourceLineNo">528</span>  @Override<a name="line.528"></a>
+<span class="sourceLineNo">529</span>  public boolean seek(Cell key) throws IOException {<a name="line.529"></a>
+<span class="sourceLineNo">530</span>    if (checkFlushed()) {<a name="line.530"></a>
+<span class="sourceLineNo">531</span>      reopenAfterFlush();<a name="line.531"></a>
+<span class="sourceLineNo">532</span>    }<a name="line.532"></a>
+<span class="sourceLineNo">533</span>    return this.heap.seek(key);<a name="line.533"></a>
+<span class="sourceLineNo">534</span>  }<a name="line.534"></a>
+<span class="sourceLineNo">535</span><a name="line.535"></a>
+<span class="sourceLineNo">536</span>  @Override<a name="line.536"></a>
+<span class="sourceLineNo">537</span>  public boolean next(List&lt;Cell&gt; outResult) throws IOException {<a name="line.537"></a>
+<span class="sourceLineNo">538</span>    return next(outResult, NoLimitScannerContext.getInstance());<a name="line.538"></a>
+<span class="sourceLineNo">539</span>  }<a name="line.539"></a>
+<span class="sourceLineNo">540</span><a name="line.540"></a>
+<span class="sourceLineNo">541</span>  /**<a name="line.541"></a>
+<span class="sourceLineNo">542</span>   * Get the next row of values from this Store.<a name="line.542"></a>
+<span class="sourceLineNo">543</span>   * @param outResult<a name="line.543"></a>
+<span class="sourceLineNo">544</span>   * @param scannerContext<a name="line.544"></a>
+<span class="sourceLineNo">545</span>   * @return true if there are more rows, false if scanner is done<a name="line.545"></a>
+<span class="sourceLineNo">546</span>   */<a name="line.546"></a>
+<span class="sourceLineNo">547</span>  @Override<a name="line.547"></a>
+<span class="sourceLineNo">548</span>  public boolean next(List&lt;Cell&gt; outResult, ScannerContext scannerContext) throws IOException {<a name="line.548"></a>
+<span class="sourceLineNo">549</span>    if (scannerContext == null) {<a name="line.549"></a>
+<span class="sourceLineNo">550</span>      throw new IllegalArgumentException("Scanner context cannot be null");<a name="line.550"></a>
+<span class="sourceLineNo">551</span>    }<a name="line.551"></a>
+<span class="sourceLineNo">552</span>    if (checkFlushed() &amp;&amp; reopenAfterFlush()) {<a name="line.552"></a>
+<span class="sourceLineNo">553</span>      return scannerContext.setScannerState(NextState.MORE_VALUES).hasMoreValues();<a name="line.553"></a>
+<span class="sourceLineNo">554</span>    }<a name="line.554"></a>
+<span class="sourceLineNo">555</span><a name="line.555"></a>
+<span class="sourceLineNo">556</span>    // if the heap was left null, then the scanners had previously run out anyways, close and<a name="line.556"></a>
+<span class="sourceLineNo">557</span>    // return.<a name="line.557"></a>
+<span class="sourceLineNo">558</span>    if (this.heap == null) {<a name="line.558"></a>
+<span class="sourceLineNo">559</span>      // By this time partial close should happened because already heap is null<a name="line.559"></a>
+<span class="sourceLineNo">560</span>      close(false);// Do all cleanup except heap.close()<a name="line.560"></a>
+<span class="sourceLineNo">561</span>      return scannerContext.setScannerState(NextState.NO_MORE_VALUES).hasMoreValues();<a name="line.561"></a>
+<span class="sourceLineNo">562</span>    }<a name="line.562"></a>
 <span class="sourceLineNo">563</span><a name="line.563"></a>
-<span class="sourceLineNo">564</span>    // If no limits exists in the scope LimitScope.Between_Cells then we are sure we are changing<a name="line.564"></a>
-<span class="sourceLineNo">565</span>    // rows. Else it is possible we are still traversing the same row so we must perform the row<a name="line.565"></a>
-<span class="sourceLineNo">566</span>    // comparison.<a name="line.566"></a>
-<span class="sourceLineNo">567</span>    if (!scannerContext.hasAnyLimit(LimitScope.BETWEEN_CELLS) || matcher.currentRow() == null) {<a name="line.567"></a>
-<span class="sourceLineNo">568</span>      this.countPerRow = 0;<a name="line.568"></a>
-<span class="sourceLineNo">569</span>      matcher.setToNewRow(cell);<a name="line.569"></a>
-<span class="sourceLineNo">570</span>    }<a name="line.570"></a>
-<span class="sourceLineNo">571</span><a name="line.571"></a>
-<span class="sourceLineNo">572</span>    // Clear progress away unless invoker has indicated it should be kept.<a name="line.572"></a>
-<span class="sourceLineNo">573</span>    if (!scannerContext.getKeepProgress()) {<a name="line.573"></a>
-<span class="sourceLineNo">574</span>      scannerContext.clearProgress();<a name="line.574"></a>
-<span class="sourceLineNo">575</span>    }<a name="line.575"></a>
-<span class="sourceLineNo">576</span><a name="line.576"></a>
-<span class="sourceLineNo">577</span>    // Only do a sanity-check if store and comparator are available.<a name="line.577"></a>
-<span class="sourceLineNo">578</span>    CellComparator comparator = store != null ? store.getComparator() : null;<a name="line.578"></a>
-<span class="sourceLineNo">579</span><a name="line.579"></a>
-<span class="sourceLineNo">580</span>    int count = 0;<a name="line.580"></a>
-<span class="sourceLineNo">581</span>    long totalBytesRead = 0;<a name="line.581"></a>
-<span class="sourceLineNo">582</span><a name="line.582"></a>
-<span class="sourceLineNo">583</span>    LOOP: do {<a name="line.583"></a>
-<span class="sourceLineNo">584</span>      // Update and check the time limit based on the configured value of cellsPerTimeoutCheck<a name="line.584"></a>
-<span class="sourceLineNo">585</span>      if ((kvsScanned % cellsPerHeartbeatCheck == 0)) {<a name="line.585"></a>
-<span class="sourceLineNo">586</span>        scannerContext.updateTimeProgress();<a name="line.586"></a>
-<span class="sourceLineNo">587</span>        if (scannerContext.checkTimeLimit(LimitScope.BETWEEN_CELLS)) {<a name="line.587"></a>
-<span class="sourceLineNo">588</span>          scannerContext.setPeekedCellInHeartbeat(prevCell);<a name="line.588"></a>
-<span class="sourceLineNo">589</span>          return scannerContext.setScannerState(NextState.TIME_LIMIT_REACHED).hasMoreValues();<a name="line.589"></a>
-<span class="sourceLineNo">590</span>        }<a name="line.590"></a>
-<span class="sourceLineNo">591</span>      }<a name="line.591"></a>
-<span class="sourceLineNo">592</span>      // Do object compare - we set prevKV from the same heap.<a name="line.592"></a>
-<span class="sourceLineNo">593</span>      if (prevCell != cell) {<a name="line.593"></a>
-<span class="sourceLineNo">594</span>        ++kvsScanned;<a name="line.594"></a>
-<span class="sourceLineNo">595</span>      }<a name="line.595"></a>
-<span class="sourceLineNo">596</span>      checkScanOrder(prevCell, cell, comparator);<a name="line.596"></a>
-<span class="sourceLineNo">597</span>      int cellSize = CellUtil.estimatedSerializedSizeOf(cell);<a name="line.597"></a>
-<span class="sourceLineNo">598</span>      bytesRead += cellSize;<a name="line.598"></a>
-<span class="sourceLineNo">599</span>      prevCell = cell;<a name="line.599"></a>
-<span class="sourceLineNo">600</span>      ScanQueryMatcher.MatchCode qcode = matcher.match(cell);<a name="line.600"></a>
-<span class="sourceLineNo">601</span>      switch (qcode) {<a name="line.601"></a>
-<span class="sourceLineNo">602</span>        case INCLUDE:<a name="line.602"></a>
-<span class="sourceLineNo">603</span>        case INCLUDE_AND_SEEK_NEXT_ROW:<a name="line.603"></a>
-<span class="sourceLineNo">604</span>        case INCLUDE_AND_SEEK_NEXT_COL:<a name="line.604"></a>
-<span class="sourceLineNo">605</span><a name="line.605"></a>
-<span class="sourceLineNo">606</span>          Filter f = matcher.getFilter();<a name="line.606"></a>
-<span class="sourceLineNo">607</span>          if (f != null) {<a name="line.607"></a>
-<span class="sourceLineNo">608</span>            cell = f.transformCell(cell);<a name="line.608"></a>
-<span class="sourceLineNo">609</span>          }<a name="line.609"></a>
-<span class="sourceLineNo">610</span><a name="line.610"></a>
-<span class="sourceLineNo">611</span>          this.countPerRow++;<a name="line.611"></a>
-<span class="sourceLineNo">612</span>          if (storeLimit &gt; -1 &amp;&amp; this.countPerRow &gt; (storeLimit + storeOffset)) {<a name="line.612"></a>
-<span class="sourceLineNo">613</span>            // do what SEEK_NEXT_ROW does.<a name="line.613"></a>
-<span class="sourceLineNo">614</span>            if (!matcher.moreRowsMayExistAfter(cell)) {<a name="line.614"></a>
-<span class="sourceLineNo">615</span>              close(false);// Do all cleanup except heap.close()<a name="line.615"></a>
-<span class="sourceLineNo">616</span>              return scannerContext.setScannerState(NextState.NO_MORE_VALUES).hasMoreValues();<a name="line.616"></a>
-<span class="sourceLineNo">617</span>            }<a name="line.617"></a>
-<span class="sourceLineNo">618</span>            matcher.clearCurrentRow();<a name="line.618"></a>
-<span class="sourceLineNo">619</span>            seekToNextRow(cell);<a name="line.619"></a>
-<span class="sourceLineNo">620</span>            break LOOP;<a name="line.620"></a>
-<span class="sourceLineNo">621</span>          }<a name="line.621"></a>
-<span class="sourceLineNo">622</span><a name="line.622"></a>
-<span class="sourceLineNo">623</span>          // add to results only if we have skipped #storeOffset kvs<a name="line.623"></a>
-<span class="sourceLineNo">624</span>          // also update metric accordingly<a name="line.624"></a>
-<span class="sourceLineNo">625</span>          if (this.countPerRow &gt; storeOffset) {<a name="line.625"></a>
-<span class="sourceLineNo">626</span>            outResult.add(cell);<a name="line.626"></a>
-<span class="sourceLineNo">627</span><a name="line.627"></a>
-<span class="sourceLineNo">628</span>            // Update local tracking information<a name="line.628"></a>
-<span class="sourceLineNo">629</span>            count++;<a name="line.629"></a>
-<span class="sourceLineNo">630</span>            totalBytesRead += cellSize;<a name="line.630"></a>
+<span class="sourceLineNo">564</span>    Cell cell = this.heap.peek();<a name="line.564"></a>
+<span class="sourceLineNo">565</span>    if (cell == null) {<a name="line.565"></a>
+<span class="sourceLineNo">566</span>      close(false);// Do all cleanup except heap.close()<a name="line.566"></a>
+<span class="sourceLineNo">567</span>      return scannerContext.setScannerState(NextState.NO_MORE_VALUES).hasMoreValues();<a name="line.567"></a>
+<span class="sourceLineNo">568</span>    }<a name="line.568"></a>
+<span class="sourceLineNo">569</span><a name="line.569"></a>
+<span class="sourceLineNo">570</span>    // only call setRow if the row changes; avoids confusing the query matcher<a name="line.570"></a>
+<span class="sourceLineNo">571</span>    // if scanning intra-row<a name="line.571"></a>
+<span class="sourceLineNo">572</span><a name="line.572"></a>
+<span class="sourceLineNo">573</span>    // If no limits exists in the scope LimitScope.Between_Cells then we are sure we are changing<a name="line.573"></a>
+<span class="sourceLineNo">574</span>    // rows. Else it is possible we are still traversing the same row so we must perform the row<a name="line.574"></a>
+<span class="sourceLineNo">575</span>    // comparison.<a name="line.575"></a>
+<span class="sourceLineNo">576</span>    if (!scannerContext.hasAnyLimit(LimitScope.BETWEEN_CELLS) || matcher.currentRow() == null) {<a name="line.576"></a>
+<span class="sourceLineNo">577</span>      this.countPerRow = 0;<a name="line.577"></a>
+<span class="sourceLineNo">578</span>      matcher.setToNewRow(cell);<a name="line.578"></a>
+<span class="sourceLineNo">579</span>    }<a name="line.579"></a>
+<span class="sourceLineNo">580</span><a name="line.580"></a>
+<span class="sourceLineNo">581</span>    // Clear progress away unless invoker has indicated it should be kept.<a name="line.581"></a>
+<span class="sourceLineNo">582</span>    if (!scannerContext.getKeepProgress()) {<a name="line.582"></a>
+<span class="sourceLineNo">583</span>      scannerContext.clearProgress();<a name="line.583"></a>
+<span class="sourceLineNo">584</span>    }<a name="line.584"></a>
+<span class="sourceLineNo">585</span><a name="line.585"></a>
+<span class="sourceLineNo">586</span>    // Only do a sanity-check if store and comparator are available.<a name="line.586"></a>
+<span class="sourceLineNo">587</span>    CellComparator comparator = store != null ? store.getComparator() : null;<a name="line.587"></a>
+<span class="sourceLineNo">588</span><a name="line.588"></a>
+<span class="sourceLineNo">589</span>    int count = 0;<a name="line.589"></a>
+<span class="sourceLineNo">590</span>    long totalBytesRead = 0;<a name="line.590"></a>
+<span class="sourceLineNo">591</span><a name="line.591"></a>
+<span class="sourceLineNo">592</span>    LOOP: do {<a name="line.592"></a>
+<span class="sourceLineNo">593</span>      // Update and check the time limit based on the configured value of cellsPerTimeoutCheck<a name="line.593"></a>
+<span class="sourceLineNo">594</span>      if ((kvsScanned % cellsPerHeartbeatCheck == 0)) {<a name="line.594"></a>
+<span class="sourceLineNo">595</span>        scannerContext.updateTimeProgress();<a name="line.595"></a>
+<span class="sourceLineNo">596</span>        if (scannerContext.checkTimeLimit(LimitScope.BETWEEN_CELLS)) {<a name="line.596"></a>
+<span class="sourceLineNo">597</span>          scannerContext.setPeekedCellInHeartbeat(prevCell);<a name="line.597"></a>
+<span class="sourceLineNo">598</span>          return scannerContext.setScannerState(NextState.TIME_LIMIT_REACHED).hasMoreValues();<a name="line.598"></a>
+<span class="sourceLineNo">599</span>        }<a name="line.599"></a>
+<span class="sourceLineNo">600</span>      }<a name="line.600"></a>
+<span class="sourceLineNo">601</span>      // Do object compare - we set prevKV from the same heap.<a name="line.601"></a>
+<span class="sourceLineNo">602</span>      if (prevCell != cell) {<a name="line.602"></a>
+<span class="sourceLineNo">603</span>        ++kvsScanned;<a name="line.603"></a>
+<span class="sourceLineNo">604</span>      }<a name="line.604"></a>
+<span class="sourceLineNo">605</span>      checkScanOrder(prevCell, cell, comparator);<a name="line.605"></a>
+<span class="sourceLineNo">606</span>      int cellSize = CellUtil.estimatedSerializedSizeOf(cell);<a name="line.606"></a>
+<span class="sourceLineNo">607</span>      bytesRead += cellSize;<a name="line.607"></a>
+<span class="sourceLineNo">608</span>      prevCell = cell;<a name="line.608"></a>
+<span class="sourceLineNo">609</span>      ScanQueryMatcher.MatchCode qcode = matcher.match(cell);<a name="line.609"></a>
+<span class="sourceLineNo">610</span>      switch (qcode) {<a name="line.610"></a>
+<span class="sourceLineNo">611</span>        case INCLUDE:<a name="line.611"></a>
+<span class="sourceLineNo">612</span>        case INCLUDE_AND_SEEK_NEXT_ROW:<a name="line.612"></a>
+<span class="sourceLineNo">613</span>        case INCLUDE_AND_SEEK_NEXT_COL:<a name="line.613"></a>
+<span class="sourceLineNo">614</span><a name="line.614"></a>
+<span class="sourceLineNo">615</span>          Filter f = matcher.getFilter();<a name="line.615"></a>
+<span class="sourceLineNo">616</span>          if (f != null) {<a name="line.616"></a>
+<span class="sourceLineNo">617</span>            cell = f.transformCell(cell);<a name="line.617"></a>
+<span class="sourceLineNo">618</span>          }<a name="line.618"></a>
+<span class="sourceLineNo">619</span><a name="line.619"></a>
+<span class="sourceLineNo">620</span>          this.countPerRow++;<a name="line.620"></a>
+<span class="sourceLineNo">621</span>          if (storeLimit &gt; -1 &amp;&amp; this.countPerRow &gt; (storeLimit + storeOffset)) {<a name="line.621"></a>
+<span class="sourceLineNo">622</span>            // do what SEEK_NEXT_ROW does.<a name="line.622"></a>
+<span class="sourceLineNo">623</span>            if (!matcher.moreRowsMayExistAfter(cell)) {<a name="line.623"></a>
+<span class="sourceLineNo">624</span>              close(false);// Do all cleanup except heap.close()<a name="line.624"></a>
+<span class="sourceLineNo">625</span>              return scannerContext.setScannerState(NextState.NO_MORE_VALUES).hasMoreValues();<a name="line.625"></a>
+<span class="sourceLineNo">626</span>            }<a name="line.626"></a>
+<span class="sourceLineNo">627</span>            matcher.clearCurrentRow();<a name="line.627"></a>
+<span class="sourceLineNo">628</span>            seekToNextRow(cell);<a name="line.628"></a>
+<span class="sourceLineNo">629</span>            break LOOP;<a name="line.629"></a>
+<span class="sourceLineNo">630</span>          }<a name="line.630"></a>
 <span class="sourceLineNo">

<TRUNCATED>