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Posted to dev@hbase.apache.org by "Cosmin Lehene (JIRA)" <ji...@apache.org> on 2009/12/12 13:32:18 UTC
[jira] Commented: (HBASE-1972) Failed split results in closed
region and non-registration of daughters; fix the order in which things are
run
[ https://issues.apache.org/jira/browse/HBASE-1972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12789729#action_12789729 ]
Cosmin Lehene commented on HBASE-1972:
--------------------------------------
@Stack, this looks like HDFS-630. What version of HDFS were you running? I'd like to reproduce it. However, even if this would work after HDFS-630, it seems we need to fix the HBase logic around this as well.
> Failed split results in closed region and non-registration of daughters; fix the order in which things are run
> --------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-1972
> URL: https://issues.apache.org/jira/browse/HBASE-1972
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
> Priority: Blocker
> Fix For: 0.21.0
>
>
> As part of a split, we go to close the region. The close fails because flush failed -- a DN was down and HDFS refuses to move past it -- so we jump up out of the close with an IOE. But the region has been closed yet its still in the .META. as online.
> Here is where the hole is:
> 1. CompactSplitThread calls split.
> 2. This calls HRegion splitRegion.
> 3. splitRegion calls close(false).
> 4. Down the end of the close, we get as far as the LOG.info("Closed " + this)..... but a DFSClient running thread throws an exception because it can't allocate block for the flush made as part of the close (Ain't sure how... we should add more try/catch in here):
> {code}
> 2009-11-12 00:47:17,865 [regionserver/208.76.44.142:60020.compactor] DEBUG org.apache.hadoop.hbase.regionserver.Store: Added hdfs://aa0-000-12.u.powerset.com:9002/hbase/TestTable/868626151/info/5071349140567656566, entries=46975, sequenceid=2350017, memsize=52.0m, filesize=46.5m to TestTable,,1257986664542
> 2009-11-12 00:47:17,866 [regionserver/208.76.44.142:60020.compactor] DEBUG org.apache.hadoop.hbase.regionserver.HRegion: Finished memstore flush of ~52.0m for region TestTable,,1257986664542 in 7985ms, sequence id=2350017, compaction requested=false
> 2009-11-12 00:47:17,866 [regionserver/208.76.44.142:60020.compactor] DEBUG org.apache.hadoop.hbase.regionserver.Store: closed info
> 2009-11-12 00:47:17,866 [regionserver/208.76.44.142:60020.compactor] INFO org.apache.hadoop.hbase.regionserver.HRegion: Closed TestTable,,1257986664542
> 2009-11-12 00:47:17,906 [Thread-315] INFO org.apache.hadoop.hdfs.DFSClient: Exception in createBlockOutputStream java.io.IOException: Bad connect ack with firstBadLink as 208.76.44.140:51010
> 2009-11-12 00:47:17,906 [Thread-315] INFO org.apache.hadoop.hdfs.DFSClient: Abandoning block blk_1351692500502810095_1391
> 2009-11-12 00:47:23,918 [Thread-315] INFO org.apache.hadoop.hdfs.DFSClient: Exception in createBlockOutputStream java.io.IOException: Bad connect ack with firstBadLink as 208.76.44.140:51010
> 2009-11-12 00:47:23,918 [Thread-315] INFO org.apache.hadoop.hdfs.DFSClient: Abandoning block blk_-3310646336307339512_1391
> 2009-11-12 00:47:29,982 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient: Exception in createBlockOutputStream java.io.IOException: Bad connect ack with firstBadLink as 208.76.44.140:51010
> 2009-11-12 00:47:29,982 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient: Abandoning block blk_3070440586900692765_1393
> 2009-11-12 00:47:35,997 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient: Exception in createBlockOutputStream java.io.IOException: Bad connect ack with firstBadLink as 208.76.44.140:51010
> 2009-11-12 00:47:35,997 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient: Abandoning block blk_-5656011219762164043_1393
> 2009-11-12 00:47:42,007 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient: Exception in createBlockOutputStream java.io.IOException: Bad connect ack with firstBadLink as 208.76.44.140:51010
> 2009-11-12 00:47:42,007 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient: Abandoning block blk_-2359634393837722978_1393
> 2009-11-12 00:47:48,017 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient: Exception in createBlockOutputStream java.io.IOException: Bad connect ack with firstBadLink as 208.76.44.140:51010
> 2009-11-12 00:47:48,017 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient: Abandoning block blk_-1626727145091780831_1393
> 2009-11-12 00:47:54,022 [Thread-318] WARN org.apache.hadoop.hdfs.DFSClient: DataStreamer Exception: java.io.IOException: Unable to create new block.
> at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSClient.java:3100)
> at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2681)
> 2009-11-12 00:47:54,022 [Thread-318] WARN org.apache.hadoop.hdfs.DFSClient: Could not get block locations. Source file "/hbase/TestTable/868626151/splits/1211221550/info/5071349140567656566.868626151" - Aborting...
> 2009-11-12 00:47:54,029 [regionserver/208.76.44.142:60020.compactor] ERROR org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction/Split failed for region TestTable,,1257986664542
> java.io.IOException: Bad connect ack with firstBadLink as 208.76.44.140:51010
> at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.createBlockOutputStream(DFSClient.java:3160)
> at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSClient.java:3080)
> at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2681)
> {code}
> Marking this as blocker.
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