You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by mi...@apache.org on 2016/02/03 18:26:13 UTC
[40/51] [partial] hbase-site git commit: Published site at
2f5767376f42c0416e025df412e3d5944a1b2a67.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/6a13df3e/devapidocs/src-html/org/apache/hadoop/hbase/master/CatalogJanitor.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/CatalogJanitor.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/CatalogJanitor.html
index 0129065..f72db18 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/CatalogJanitor.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/CatalogJanitor.html
@@ -222,227 +222,228 @@
<span class="sourceLineNo">214</span> int scan() throws IOException {<a name="line.214"></a>
<span class="sourceLineNo">215</span> try {<a name="line.215"></a>
<span class="sourceLineNo">216</span> if (!alreadyRunning.compareAndSet(false, true)) {<a name="line.216"></a>
-<span class="sourceLineNo">217</span> return 0;<a name="line.217"></a>
-<span class="sourceLineNo">218</span> }<a name="line.218"></a>
-<span class="sourceLineNo">219</span> Triple<Integer, Map<HRegionInfo, Result>, Map<HRegionInfo, Result>> scanTriple =<a name="line.219"></a>
-<span class="sourceLineNo">220</span> getMergedRegionsAndSplitParents();<a name="line.220"></a>
-<span class="sourceLineNo">221</span> int count = scanTriple.getFirst();<a name="line.221"></a>
-<span class="sourceLineNo">222</span> /**<a name="line.222"></a>
-<span class="sourceLineNo">223</span> * clean merge regions first<a name="line.223"></a>
-<span class="sourceLineNo">224</span> */<a name="line.224"></a>
-<span class="sourceLineNo">225</span> int mergeCleaned = 0;<a name="line.225"></a>
-<span class="sourceLineNo">226</span> Map<HRegionInfo, Result> mergedRegions = scanTriple.getSecond();<a name="line.226"></a>
-<span class="sourceLineNo">227</span> for (Map.Entry<HRegionInfo, Result> e : mergedRegions.entrySet()) {<a name="line.227"></a>
-<span class="sourceLineNo">228</span> PairOfSameType<HRegionInfo> p = MetaTableAccessor.getMergeRegions(e.getValue());<a name="line.228"></a>
-<span class="sourceLineNo">229</span> HRegionInfo regionA = p.getFirst();<a name="line.229"></a>
-<span class="sourceLineNo">230</span> HRegionInfo regionB = p.getSecond();<a name="line.230"></a>
-<span class="sourceLineNo">231</span> if (regionA == null || regionB == null) {<a name="line.231"></a>
-<span class="sourceLineNo">232</span> LOG.warn("Unexpected references regionA="<a name="line.232"></a>
-<span class="sourceLineNo">233</span> + (regionA == null ? "null" : regionA.getRegionNameAsString())<a name="line.233"></a>
-<span class="sourceLineNo">234</span> + ",regionB="<a name="line.234"></a>
-<span class="sourceLineNo">235</span> + (regionB == null ? "null" : regionB.getRegionNameAsString())<a name="line.235"></a>
-<span class="sourceLineNo">236</span> + " in merged region " + e.getKey().getRegionNameAsString());<a name="line.236"></a>
-<span class="sourceLineNo">237</span> } else {<a name="line.237"></a>
-<span class="sourceLineNo">238</span> if (cleanMergeRegion(e.getKey(), regionA, regionB)) {<a name="line.238"></a>
-<span class="sourceLineNo">239</span> mergeCleaned++;<a name="line.239"></a>
-<span class="sourceLineNo">240</span> }<a name="line.240"></a>
-<span class="sourceLineNo">241</span> }<a name="line.241"></a>
-<span class="sourceLineNo">242</span> }<a name="line.242"></a>
-<span class="sourceLineNo">243</span> /**<a name="line.243"></a>
-<span class="sourceLineNo">244</span> * clean split parents<a name="line.244"></a>
-<span class="sourceLineNo">245</span> */<a name="line.245"></a>
-<span class="sourceLineNo">246</span> Map<HRegionInfo, Result> splitParents = scanTriple.getThird();<a name="line.246"></a>
-<span class="sourceLineNo">247</span><a name="line.247"></a>
-<span class="sourceLineNo">248</span> // Now work on our list of found parents. See if any we can clean up.<a name="line.248"></a>
-<span class="sourceLineNo">249</span> int splitCleaned = 0;<a name="line.249"></a>
-<span class="sourceLineNo">250</span> // regions whose parents are still around<a name="line.250"></a>
-<span class="sourceLineNo">251</span> HashSet<String> parentNotCleaned = new HashSet<String>();<a name="line.251"></a>
-<span class="sourceLineNo">252</span> for (Map.Entry<HRegionInfo, Result> e : splitParents.entrySet()) {<a name="line.252"></a>
-<span class="sourceLineNo">253</span> if (!parentNotCleaned.contains(e.getKey().getEncodedName()) &&<a name="line.253"></a>
-<span class="sourceLineNo">254</span> cleanParent(e.getKey(), e.getValue())) {<a name="line.254"></a>
-<span class="sourceLineNo">255</span> splitCleaned++;<a name="line.255"></a>
-<span class="sourceLineNo">256</span> } else {<a name="line.256"></a>
-<span class="sourceLineNo">257</span> // We could not clean the parent, so it's daughters should not be<a name="line.257"></a>
-<span class="sourceLineNo">258</span> // cleaned either (HBASE-6160)<a name="line.258"></a>
-<span class="sourceLineNo">259</span> PairOfSameType<HRegionInfo> daughters =<a name="line.259"></a>
-<span class="sourceLineNo">260</span> MetaTableAccessor.getDaughterRegions(e.getValue());<a name="line.260"></a>
-<span class="sourceLineNo">261</span> parentNotCleaned.add(daughters.getFirst().getEncodedName());<a name="line.261"></a>
-<span class="sourceLineNo">262</span> parentNotCleaned.add(daughters.getSecond().getEncodedName());<a name="line.262"></a>
-<span class="sourceLineNo">263</span> }<a name="line.263"></a>
-<span class="sourceLineNo">264</span> }<a name="line.264"></a>
-<span class="sourceLineNo">265</span> if ((mergeCleaned + splitCleaned) != 0) {<a name="line.265"></a>
-<span class="sourceLineNo">266</span> LOG.info("Scanned " + count + " catalog row(s), gc'd " + mergeCleaned<a name="line.266"></a>
-<span class="sourceLineNo">267</span> + " unreferenced merged region(s) and " + splitCleaned<a name="line.267"></a>
-<span class="sourceLineNo">268</span> + " unreferenced parent region(s)");<a name="line.268"></a>
-<span class="sourceLineNo">269</span> } else if (LOG.isTraceEnabled()) {<a name="line.269"></a>
-<span class="sourceLineNo">270</span> LOG.trace("Scanned " + count + " catalog row(s), gc'd " + mergeCleaned<a name="line.270"></a>
-<span class="sourceLineNo">271</span> + " unreferenced merged region(s) and " + splitCleaned<a name="line.271"></a>
-<span class="sourceLineNo">272</span> + " unreferenced parent region(s)");<a name="line.272"></a>
-<span class="sourceLineNo">273</span> }<a name="line.273"></a>
-<span class="sourceLineNo">274</span> return mergeCleaned + splitCleaned;<a name="line.274"></a>
-<span class="sourceLineNo">275</span> } finally {<a name="line.275"></a>
-<span class="sourceLineNo">276</span> alreadyRunning.set(false);<a name="line.276"></a>
-<span class="sourceLineNo">277</span> }<a name="line.277"></a>
-<span class="sourceLineNo">278</span> }<a name="line.278"></a>
-<span class="sourceLineNo">279</span><a name="line.279"></a>
-<span class="sourceLineNo">280</span> /**<a name="line.280"></a>
-<span class="sourceLineNo">281</span> * Compare HRegionInfos in a way that has split parents sort BEFORE their<a name="line.281"></a>
-<span class="sourceLineNo">282</span> * daughters.<a name="line.282"></a>
-<span class="sourceLineNo">283</span> */<a name="line.283"></a>
-<span class="sourceLineNo">284</span> static class SplitParentFirstComparator implements Comparator<HRegionInfo> {<a name="line.284"></a>
-<span class="sourceLineNo">285</span> Comparator<byte[]> rowEndKeyComparator = new Bytes.RowEndKeyComparator();<a name="line.285"></a>
-<span class="sourceLineNo">286</span> @Override<a name="line.286"></a>
-<span class="sourceLineNo">287</span> public int compare(HRegionInfo left, HRegionInfo right) {<a name="line.287"></a>
-<span class="sourceLineNo">288</span> // This comparator differs from the one HRegionInfo in that it sorts<a name="line.288"></a>
-<span class="sourceLineNo">289</span> // parent before daughters.<a name="line.289"></a>
-<span class="sourceLineNo">290</span> if (left == null) return -1;<a name="line.290"></a>
-<span class="sourceLineNo">291</span> if (right == null) return 1;<a name="line.291"></a>
-<span class="sourceLineNo">292</span> // Same table name.<a name="line.292"></a>
-<span class="sourceLineNo">293</span> int result = left.getTable().compareTo(right.getTable());<a name="line.293"></a>
-<span class="sourceLineNo">294</span> if (result != 0) return result;<a name="line.294"></a>
-<span class="sourceLineNo">295</span> // Compare start keys.<a name="line.295"></a>
-<span class="sourceLineNo">296</span> result = Bytes.compareTo(left.getStartKey(), right.getStartKey());<a name="line.296"></a>
-<span class="sourceLineNo">297</span> if (result != 0) return result;<a name="line.297"></a>
-<span class="sourceLineNo">298</span> // Compare end keys, but flip the operands so parent comes first<a name="line.298"></a>
-<span class="sourceLineNo">299</span> result = rowEndKeyComparator.compare(right.getEndKey(), left.getEndKey());<a name="line.299"></a>
-<span class="sourceLineNo">300</span><a name="line.300"></a>
-<span class="sourceLineNo">301</span> return result;<a name="line.301"></a>
-<span class="sourceLineNo">302</span> }<a name="line.302"></a>
-<span class="sourceLineNo">303</span> }<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> * If daughters no longer hold reference to the parents, delete the parent.<a name="line.306"></a>
-<span class="sourceLineNo">307</span> * @param parent HRegionInfo of split offlined parent<a name="line.307"></a>
-<span class="sourceLineNo">308</span> * @param rowContent Content of <code>parent</code> row in<a name="line.308"></a>
-<span class="sourceLineNo">309</span> * <code>metaRegionName</code><a name="line.309"></a>
-<span class="sourceLineNo">310</span> * @return True if we removed <code>parent</code> from meta table and from<a name="line.310"></a>
-<span class="sourceLineNo">311</span> * the filesystem.<a name="line.311"></a>
-<span class="sourceLineNo">312</span> * @throws IOException<a name="line.312"></a>
-<span class="sourceLineNo">313</span> */<a name="line.313"></a>
-<span class="sourceLineNo">314</span> boolean cleanParent(final HRegionInfo parent, Result rowContent)<a name="line.314"></a>
-<span class="sourceLineNo">315</span> throws IOException {<a name="line.315"></a>
-<span class="sourceLineNo">316</span> boolean result = false;<a name="line.316"></a>
-<span class="sourceLineNo">317</span> // Check whether it is a merged region and not clean reference<a name="line.317"></a>
-<span class="sourceLineNo">318</span> // No necessary to check MERGEB_QUALIFIER because these two qualifiers will<a name="line.318"></a>
-<span class="sourceLineNo">319</span> // be inserted/deleted together<a name="line.319"></a>
-<span class="sourceLineNo">320</span> if (rowContent.getValue(HConstants.CATALOG_FAMILY,<a name="line.320"></a>
-<span class="sourceLineNo">321</span> HConstants.MERGEA_QUALIFIER) != null) {<a name="line.321"></a>
-<span class="sourceLineNo">322</span> // wait cleaning merge region first<a name="line.322"></a>
-<span class="sourceLineNo">323</span> return result;<a name="line.323"></a>
-<span class="sourceLineNo">324</span> }<a name="line.324"></a>
-<span class="sourceLineNo">325</span> // Run checks on each daughter split.<a name="line.325"></a>
-<span class="sourceLineNo">326</span> PairOfSameType<HRegionInfo> daughters = MetaTableAccessor.getDaughterRegions(rowContent);<a name="line.326"></a>
-<span class="sourceLineNo">327</span> Pair<Boolean, Boolean> a = checkDaughterInFs(parent, daughters.getFirst());<a name="line.327"></a>
-<span class="sourceLineNo">328</span> Pair<Boolean, Boolean> b = checkDaughterInFs(parent, daughters.getSecond());<a name="line.328"></a>
-<span class="sourceLineNo">329</span> if (hasNoReferences(a) && hasNoReferences(b)) {<a name="line.329"></a>
-<span class="sourceLineNo">330</span> LOG.debug("Deleting region " + parent.getRegionNameAsString() +<a name="line.330"></a>
-<span class="sourceLineNo">331</span> " because daughter splits no longer hold references");<a name="line.331"></a>
-<span class="sourceLineNo">332</span> FileSystem fs = this.services.getMasterFileSystem().getFileSystem();<a name="line.332"></a>
-<span class="sourceLineNo">333</span> if (LOG.isTraceEnabled()) LOG.trace("Archiving parent region: " + parent);<a name="line.333"></a>
-<span class="sourceLineNo">334</span> HFileArchiver.archiveRegion(this.services.getConfiguration(), fs, parent);<a name="line.334"></a>
-<span class="sourceLineNo">335</span> MetaTableAccessor.deleteRegion(this.connection, parent);<a name="line.335"></a>
-<span class="sourceLineNo">336</span> result = true;<a name="line.336"></a>
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-<span class="sourceLineNo">338</span> return result;<a name="line.338"></a>
-<span class="sourceLineNo">339</span> }<a name="line.339"></a>
-<span class="sourceLineNo">340</span><a name="line.340"></a>
-<span class="sourceLineNo">341</span> /**<a name="line.341"></a>
-<span class="sourceLineNo">342</span> * @param p A pair where the first boolean says whether or not the daughter<a name="line.342"></a>
-<span class="sourceLineNo">343</span> * region directory exists in the filesystem and then the second boolean says<a name="line.343"></a>
-<span class="sourceLineNo">344</span> * whether the daughter has references to the parent.<a name="line.344"></a>
-<span class="sourceLineNo">345</span> * @return True the passed <code>p</code> signifies no references.<a name="line.345"></a>
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-<span class="sourceLineNo">347</span> private boolean hasNoReferences(final Pair<Boolean, Boolean> p) {<a name="line.347"></a>
-<span class="sourceLineNo">348</span> return !p.getFirst() || !p.getSecond();<a name="line.348"></a>
-<span class="sourceLineNo">349</span> }<a name="line.349"></a>
-<span class="sourceLineNo">350</span><a name="line.350"></a>
-<span class="sourceLineNo">351</span> /**<a name="line.351"></a>
-<span class="sourceLineNo">352</span> * Checks if a daughter region -- either splitA or splitB -- still holds<a name="line.352"></a>
-<span class="sourceLineNo">353</span> * references to parent.<a name="line.353"></a>
-<span class="sourceLineNo">354</span> * @param parent Parent region<a name="line.354"></a>
-<span class="sourceLineNo">355</span> * @param daughter Daughter region<a name="line.355"></a>
-<span class="sourceLineNo">356</span> * @return A pair where the first boolean says whether or not the daughter<a name="line.356"></a>
-<span class="sourceLineNo">357</span> * region directory exists in the filesystem and then the second boolean says<a name="line.357"></a>
-<span class="sourceLineNo">358</span> * whether the daughter has references to the parent.<a name="line.358"></a>
-<span class="sourceLineNo">359</span> * @throws IOException<a name="line.359"></a>
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-<span class="sourceLineNo">361</span> Pair<Boolean, Boolean> checkDaughterInFs(final HRegionInfo parent, final HRegionInfo daughter)<a name="line.361"></a>
-<span class="sourceLineNo">362</span> throws IOException {<a name="line.362"></a>
-<span class="sourceLineNo">363</span> if (daughter == null) {<a name="line.363"></a>
-<span class="sourceLineNo">364</span> return new Pair<Boolean, Boolean>(Boolean.FALSE, Boolean.FALSE);<a name="line.364"></a>
-<span class="sourceLineNo">365</span> }<a name="line.365"></a>
-<span class="sourceLineNo">366</span><a name="line.366"></a>
-<span class="sourceLineNo">367</span> FileSystem fs = this.services.getMasterFileSystem().getFileSystem();<a name="line.367"></a>
-<span class="sourceLineNo">368</span> Path rootdir = this.services.getMasterFileSystem().getRootDir();<a name="line.368"></a>
-<span class="sourceLineNo">369</span> Path tabledir = FSUtils.getTableDir(rootdir, daughter.getTable());<a name="line.369"></a>
-<span class="sourceLineNo">370</span><a name="line.370"></a>
-<span class="sourceLineNo">371</span> Path daughterRegionDir = new Path(tabledir, daughter.getEncodedName());<a name="line.371"></a>
-<span class="sourceLineNo">372</span><a name="line.372"></a>
-<span class="sourceLineNo">373</span> HRegionFileSystem regionFs = null;<a name="line.373"></a>
-<span class="sourceLineNo">374</span><a name="line.374"></a>
-<span class="sourceLineNo">375</span> try {<a name="line.375"></a>
-<span class="sourceLineNo">376</span> if (!FSUtils.isExists(fs, daughterRegionDir)) {<a name="line.376"></a>
-<span class="sourceLineNo">377</span> return new Pair<Boolean, Boolean>(Boolean.FALSE, Boolean.FALSE);<a name="line.377"></a>
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-<span class="sourceLineNo">379</span> } catch (IOException ioe) {<a name="line.379"></a>
-<span class="sourceLineNo">380</span> LOG.warn("Error trying to determine if daughter region exists, " +<a name="line.380"></a>
-<span class="sourceLineNo">381</span> "assuming exists and has references", ioe);<a name="line.381"></a>
-<span class="sourceLineNo">382</span> return new Pair<Boolean, Boolean>(Boolean.TRUE, Boolean.TRUE);<a name="line.382"></a>
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-<span class="sourceLineNo">384</span><a name="line.384"></a>
-<span class="sourceLineNo">385</span> try {<a name="line.385"></a>
-<span class="sourceLineNo">386</span> regionFs = HRegionFileSystem.openRegionFromFileSystem(<a name="line.386"></a>
-<span class="sourceLineNo">387</span> this.services.getConfiguration(), fs, tabledir, daughter, true);<a name="line.387"></a>
-<span class="sourceLineNo">388</span> } catch (IOException e) {<a name="line.388"></a>
-<span class="sourceLineNo">389</span> LOG.warn("Error trying to determine referenced files from : " + daughter.getEncodedName()<a name="line.389"></a>
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-<span class="sourceLineNo">408</span><a name="line.408"></a>
-<span class="sourceLineNo">409</span> /**<a name="line.409"></a>
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-<span class="sourceLineNo">421</span> .getRegionsFromMergeQualifier(this.services.getConnection(),<a name="line.421"></a>
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-<span class="sourceLineNo">425</span> // It doesn't have merge qualifier, no need to clean<a name="line.425"></a>
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-<span class="sourceLineNo">431</span> + " has only one merge qualifier in META.");<a name="line.431"></a>
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-<span class="sourceLineNo">435</span> mergeRegions.getSecond());<a name="line.435"></a>
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+<span class="sourceLineNo">217</span> LOG.debug("CatalogJanitor already running");<a name="line.217"></a>
+<span class="sourceLineNo">218</span> return 0;<a name="line.218"></a>
+<span class="sourceLineNo">219</span> }<a name="line.219"></a>
+<span class="sourceLineNo">220</span> Triple<Integer, Map<HRegionInfo, Result>, Map<HRegionInfo, Result>> scanTriple =<a name="line.220"></a>
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+<span class="sourceLineNo">269</span> + " unreferenced parent region(s)");<a name="line.269"></a>
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+<span class="sourceLineNo">273</span> + " unreferenced parent region(s)");<a name="line.273"></a>
+<span class="sourceLineNo">274</span> }<a name="line.274"></a>
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+<span class="sourceLineNo">276</span> } finally {<a name="line.276"></a>
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+<span class="sourceLineNo">283</span> * daughters.<a name="line.283"></a>
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+<span class="sourceLineNo">295</span> if (result != 0) return result;<a name="line.295"></a>
+<span class="sourceLineNo">296</span> // Compare start keys.<a name="line.296"></a>
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+<span class="sourceLineNo">301</span><a name="line.301"></a>
+<span class="sourceLineNo">302</span> return result;<a name="line.302"></a>
+<span class="sourceLineNo">303</span> }<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> /**<a name="line.306"></a>
+<span class="sourceLineNo">307</span> * If daughters no longer hold reference to the parents, delete the parent.<a name="line.307"></a>
+<span class="sourceLineNo">308</span> * @param parent HRegionInfo of split offlined parent<a name="line.308"></a>
+<span class="sourceLineNo">309</span> * @param rowContent Content of <code>parent</code> row in<a name="line.309"></a>
+<span class="sourceLineNo">310</span> * <code>metaRegionName</code><a name="line.310"></a>
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+<span class="sourceLineNo">312</span> * the filesystem.<a name="line.312"></a>
+<span class="sourceLineNo">313</span> * @throws IOException<a name="line.313"></a>
+<span class="sourceLineNo">314</span> */<a name="line.314"></a>
+<span class="sourceLineNo">315</span> boolean cleanParent(final HRegionInfo parent, Result rowContent)<a name="line.315"></a>
+<span class="sourceLineNo">316</span> throws IOException {<a name="line.316"></a>
+<span class="sourceLineNo">317</span> boolean result = false;<a name="line.317"></a>
+<span class="sourceLineNo">318</span> // Check whether it is a merged region and not clean reference<a name="line.318"></a>
+<span class="sourceLineNo">319</span> // No necessary to check MERGEB_QUALIFIER because these two qualifiers will<a name="line.319"></a>
+<span class="sourceLineNo">320</span> // be inserted/deleted together<a name="line.320"></a>
+<span class="sourceLineNo">321</span> if (rowContent.getValue(HConstants.CATALOG_FAMILY,<a name="line.321"></a>
+<span class="sourceLineNo">322</span> HConstants.MERGEA_QUALIFIER) != null) {<a name="line.322"></a>
+<span class="sourceLineNo">323</span> // wait cleaning merge region first<a name="line.323"></a>
+<span class="sourceLineNo">324</span> return result;<a name="line.324"></a>
+<span class="sourceLineNo">325</span> }<a name="line.325"></a>
+<span class="sourceLineNo">326</span> // Run checks on each daughter split.<a name="line.326"></a>
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+<span class="sourceLineNo">328</span> Pair<Boolean, Boolean> a = checkDaughterInFs(parent, daughters.getFirst());<a name="line.328"></a>
+<span class="sourceLineNo">329</span> Pair<Boolean, Boolean> b = checkDaughterInFs(parent, daughters.getSecond());<a name="line.329"></a>
+<span class="sourceLineNo">330</span> if (hasNoReferences(a) && hasNoReferences(b)) {<a name="line.330"></a>
+<span class="sourceLineNo">331</span> LOG.debug("Deleting region " + parent.getRegionNameAsString() +<a name="line.331"></a>
+<span class="sourceLineNo">332</span> " because daughter splits no longer hold references");<a name="line.332"></a>
+<span class="sourceLineNo">333</span> FileSystem fs = this.services.getMasterFileSystem().getFileSystem();<a name="line.333"></a>
+<span class="sourceLineNo">334</span> if (LOG.isTraceEnabled()) LOG.trace("Archiving parent region: " + parent);<a name="line.334"></a>
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+<span class="sourceLineNo">337</span> result = true;<a name="line.337"></a>
+<span class="sourceLineNo">338</span> }<a name="line.338"></a>
+<span class="sourceLineNo">339</span> return result;<a name="line.339"></a>
+<span class="sourceLineNo">340</span> }<a name="line.340"></a>
+<span class="sourceLineNo">341</span><a name="line.341"></a>
+<span class="sourceLineNo">342</span> /**<a name="line.342"></a>
+<span class="sourceLineNo">343</span> * @param p A pair where the first boolean says whether or not the daughter<a name="line.343"></a>
+<span class="sourceLineNo">344</span> * region directory exists in the filesystem and then the second boolean says<a name="line.344"></a>
+<span class="sourceLineNo">345</span> * whether the daughter has references to the parent.<a name="line.345"></a>
+<span class="sourceLineNo">346</span> * @return True the passed <code>p</code> signifies no references.<a name="line.346"></a>
+<span class="sourceLineNo">347</span> */<a name="line.347"></a>
+<span class="sourceLineNo">348</span> private boolean hasNoReferences(final Pair<Boolean, Boolean> p) {<a name="line.348"></a>
+<span class="sourceLineNo">349</span> return !p.getFirst() || !p.getSecond();<a name="line.349"></a>
+<span class="sourceLineNo">350</span> }<a name="line.350"></a>
+<span class="sourceLineNo">351</span><a name="line.351"></a>
+<span class="sourceLineNo">352</span> /**<a name="line.352"></a>
+<span class="sourceLineNo">353</span> * Checks if a daughter region -- either splitA or splitB -- still holds<a name="line.353"></a>
+<span class="sourceLineNo">354</span> * references to parent.<a name="line.354"></a>
+<span class="sourceLineNo">355</span> * @param parent Parent region<a name="line.355"></a>
+<span class="sourceLineNo">356</span> * @param daughter Daughter region<a name="line.356"></a>
+<span class="sourceLineNo">357</span> * @return A pair where the first boolean says whether or not the daughter<a name="line.357"></a>
+<span class="sourceLineNo">358</span> * region directory exists in the filesystem and then the second boolean says<a name="line.358"></a>
+<span class="sourceLineNo">359</span> * whether the daughter has references to the parent.<a name="line.359"></a>
+<span class="sourceLineNo">360</span> * @throws IOException<a name="line.360"></a>
+<span class="sourceLineNo">361</span> */<a name="line.361"></a>
+<span class="sourceLineNo">362</span> Pair<Boolean, Boolean> checkDaughterInFs(final HRegionInfo parent, final HRegionInfo daughter)<a name="line.362"></a>
+<span class="sourceLineNo">363</span> throws IOException {<a name="line.363"></a>
+<span class="sourceLineNo">364</span> if (daughter == null) {<a name="line.364"></a>
+<span class="sourceLineNo">365</span> return new Pair<Boolean, Boolean>(Boolean.FALSE, Boolean.FALSE);<a name="line.365"></a>
+<span class="sourceLineNo">366</span> }<a name="line.366"></a>
+<span class="sourceLineNo">367</span><a name="line.367"></a>
+<span class="sourceLineNo">368</span> FileSystem fs = this.services.getMasterFileSystem().getFileSystem();<a name="line.368"></a>
+<span class="sourceLineNo">369</span> Path rootdir = this.services.getMasterFileSystem().getRootDir();<a name="line.369"></a>
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+<span class="sourceLineNo">371</span><a name="line.371"></a>
+<span class="sourceLineNo">372</span> Path daughterRegionDir = new Path(tabledir, daughter.getEncodedName());<a name="line.372"></a>
+<span class="sourceLineNo">373</span><a name="line.373"></a>
+<span class="sourceLineNo">374</span> HRegionFileSystem regionFs = null;<a name="line.374"></a>
+<span class="sourceLineNo">375</span><a name="line.375"></a>
+<span class="sourceLineNo">376</span> try {<a name="line.376"></a>
+<span class="sourceLineNo">377</span> if (!FSUtils.isExists(fs, daughterRegionDir)) {<a name="line.377"></a>
+<span class="sourceLineNo">378</span> return new Pair<Boolean, Boolean>(Boolean.FALSE, Boolean.FALSE);<a name="line.378"></a>
+<span class="sourceLineNo">379</span> }<a name="line.379"></a>
+<span class="sourceLineNo">380</span> } catch (IOException ioe) {<a name="line.380"></a>
+<span class="sourceLineNo">381</span> LOG.warn("Error trying to determine if daughter region exists, " +<a name="line.381"></a>
+<span class="sourceLineNo">382</span> "assuming exists and has references", ioe);<a name="line.382"></a>
+<span class="sourceLineNo">383</span> return new Pair<Boolean, Boolean>(Boolean.TRUE, Boolean.TRUE);<a name="line.383"></a>
+<span class="sourceLineNo">384</span> }<a name="line.384"></a>
+<span class="sourceLineNo">385</span><a name="line.385"></a>
+<span class="sourceLineNo">386</span> try {<a name="line.386"></a>
+<span class="sourceLineNo">387</span> regionFs = HRegionFileSystem.openRegionFromFileSystem(<a name="line.387"></a>
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+<span class="sourceLineNo">389</span> } catch (IOException e) {<a name="line.389"></a>
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+<span class="sourceLineNo">391</span> + ", to: " + parent.getEncodedName() + " assuming has references", e);<a name="line.391"></a>
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+<span class="sourceLineNo">393</span> }<a name="line.393"></a>
+<span class="sourceLineNo">394</span><a name="line.394"></a>
+<span class="sourceLineNo">395</span> boolean references = false;<a name="line.395"></a>
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+<span class="sourceLineNo">399</span> break;<a name="line.399"></a>
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+<span class="sourceLineNo">401</span> }<a name="line.401"></a>
+<span class="sourceLineNo">402</span> return new Pair<Boolean, Boolean>(Boolean.TRUE, Boolean.valueOf(references));<a name="line.402"></a>
+<span class="sourceLineNo">403</span> }<a name="line.403"></a>
+<span class="sourceLineNo">404</span><a name="line.404"></a>
+<span class="sourceLineNo">405</span> private HTableDescriptor getTableDescriptor(final TableName tableName)<a name="line.405"></a>
+<span class="sourceLineNo">406</span> throws FileNotFoundException, IOException {<a name="line.406"></a>
+<span class="sourceLineNo">407</span> return this.services.getTableDescriptors().get(tableName);<a name="line.407"></a>
+<span class="sourceLineNo">408</span> }<a name="line.408"></a>
+<span class="sourceLineNo">409</span><a name="line.409"></a>
+<span class="sourceLineNo">410</span> /**<a name="line.410"></a>
+<span class="sourceLineNo">411</span> * Checks if the specified region has merge qualifiers, if so, try to clean<a name="line.411"></a>
+<span class="sourceLineNo">412</span> * them<a name="line.412"></a>
+<span class="sourceLineNo">413</span> * @param region<a name="line.413"></a>
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+<span class="sourceLineNo">415</span> * @throws IOException<a name="line.415"></a>
+<span class="sourceLineNo">416</span> */<a name="line.416"></a>
+<span class="sourceLineNo">417</span> public boolean cleanMergeQualifier(final HRegionInfo region)<a name="line.417"></a>
+<span class="sourceLineNo">418</span> throws IOException {<a name="line.418"></a>
+<span class="sourceLineNo">419</span> // Get merge regions if it is a merged region and already has merge<a name="line.419"></a>
+<span class="sourceLineNo">420</span> // qualifier<a name="line.420"></a>
+<span class="sourceLineNo">421</span> Pair<HRegionInfo, HRegionInfo> mergeRegions = MetaTableAccessor<a name="line.421"></a>
+<span class="sourceLineNo">422</span> .getRegionsFromMergeQualifier(this.services.getConnection(),<a name="line.422"></a>
+<span class="sourceLineNo">423</span> region.getRegionName());<a name="line.423"></a>
+<span class="sourceLineNo">424</span> if (mergeRegions == null<a name="line.424"></a>
+<span class="sourceLineNo">425</span> || (mergeRegions.getFirst() == null && mergeRegions.getSecond() == null)) {<a name="line.425"></a>
+<span class="sourceLineNo">426</span> // It doesn't have merge qualifier, no need to clean<a name="line.426"></a>
+<span class="sourceLineNo">427</span> return true;<a name="line.427"></a>
+<span class="sourceLineNo">428</span> }<a name="line.428"></a>
+<span class="sourceLineNo">429</span> // It shouldn't happen, we must insert/delete these two qualifiers together<a name="line.429"></a>
+<span class="sourceLineNo">430</span> if (mergeRegions.getFirst() == null || mergeRegions.getSecond() == null) {<a name="line.430"></a>
+<span class="sourceLineNo">431</span> LOG.error("Merged region " + region.getRegionNameAsString()<a name="line.431"></a>
+<span class="sourceLineNo">432</span> + " has only one merge qualifier in META.");<a name="line.432"></a>
+<span class="sourceLineNo">433</span> return false;<a name="line.433"></a>
+<span class="sourceLineNo">434</span> }<a name="line.434"></a>
+<span class="sourceLineNo">435</span> return cleanMergeRegion(region, mergeRegions.getFirst(),<a name="line.435"></a>
+<span class="sourceLineNo">436</span> mergeRegions.getSecond());<a name="line.436"></a>
+<span class="sourceLineNo">437</span> }<a name="line.437"></a>
+<span class="sourceLineNo">438</span>}<a name="line.438"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/6a13df3e/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.BatchOperationInProgress.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.BatchOperationInProgress.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.BatchOperationInProgress.html
index a0ca7d9..e2c4389 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.BatchOperationInProgress.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.BatchOperationInProgress.html
@@ -1283,7 +1283,7 @@
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<span class="sourceLineNo">1276</span> @Override<a name="line.1276"></a>
<span class="sourceLineNo">1277</span> public long getReadPoint(IsolationLevel isolationLevel) {<a name="line.1277"></a>
-<span class="sourceLineNo">1278</span> if (isolationLevel == IsolationLevel.READ_UNCOMMITTED) {<a name="line.1278"></a>
+<span class="sourceLineNo">1278</span> if (isolationLevel != null && isolationLevel == IsolationLevel.READ_UNCOMMITTED) {<a name="line.1278"></a>
<span class="sourceLineNo">1279</span> // This scan can read even uncommitted transactions<a name="line.1279"></a>
<span class="sourceLineNo">1280</span> return Long.MAX_VALUE;<a name="line.1280"></a>
<span class="sourceLineNo">1281</span> }<a name="line.1281"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/6a13df3e/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.FlushResultImpl.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.FlushResultImpl.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.FlushResultImpl.html
index a0ca7d9..e2c4389 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.FlushResultImpl.html
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