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Posted to issues@hbase.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2015/12/31 14:59:49 UTC
[jira] [Commented] (HBASE-15058) AssignmentManager should account
for unsuccessful split correctly which initially passes quota check
[ https://issues.apache.org/jira/browse/HBASE-15058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15075952#comment-15075952 ]
Ted Yu commented on HBASE-15058:
--------------------------------
Turns out that I was looking at branch-1 code.
Modified description to be specific.
> AssignmentManager should account for unsuccessful split correctly which initially passes quota check
> ----------------------------------------------------------------------------------------------------
>
> Key: HBASE-15058
> URL: https://issues.apache.org/jira/browse/HBASE-15058
> Project: HBase
> Issue Type: Bug
> Reporter: Ted Yu
>
> When region split doesn't pass quota check, we would see exception similar to the following:
> {code}
> 2015-12-29 16:07:33,653 INFO [RS:0;10.21.128.189:57449-splits-1451434041585] regionserver.SplitRequest(97): Running rollback/cleanup of failed split of np2: testRegionNormalizationSplitOnCluster,zzzzz,1451434045065.27cccb3fae03002b8058beef61cb7c20.; Failed to get ok from master to split np2:testRegionNormalizationSplitOnCluster, zzzzz,1451434045065.27cccb3fae03002b8058beef61cb7c20.
> java.io.IOException: Failed to get ok from master to split np2:testRegionNormalizationSplitOnCluster,zzzzz,1451434045065.27cccb3fae03002b8058beef61cb7c20.
> at org.apache.hadoop.hbase.regionserver.SplitTransactionImpl.stepsBeforePONR(SplitTransactionImpl.java:345)
> at org.apache.hadoop.hbase.regionserver.SplitTransactionImpl.createDaughters(SplitTransactionImpl.java:262)
> at org.apache.hadoop.hbase.regionserver.SplitTransactionImpl.execute(SplitTransactionImpl.java:502)
> at org.apache.hadoop.hbase.regionserver.SplitRequest.doSplitting(SplitRequest.java:82)
> at org.apache.hadoop.hbase.regionserver.SplitRequest.run(SplitRequest.java:155)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> {code}
> However, region split may fail for subsequent SplitTransactionPhase's in stepsBeforePONR().
> Currently in branch-1, the distinction among the following states is not clear in AssignmentManager#onRegionTransition():
> {code}
> case SPLIT_PONR:
> case SPLIT:
> case SPLIT_REVERTED:
> errorMsg =
> onRegionSplit(serverName, code, hri, HRegionInfo.convert(transition.getRegionInfo(1)),
> HRegionInfo.convert(transition.getRegionInfo(2)));
> if (org.apache.commons.lang.StringUtils.isEmpty(errorMsg)) {
> try {
> regionStateListener.onRegionSplitReverted(hri);
> {code}
> onRegionSplit() handles the above 3 TransitionCode's. However, errorMsg is normally null (onRegionSplit returns null at the end).
> This would result in onRegionSplitReverted() being called for cases of SPLIT_PONR and SPLIT.
> When region split fails, AssignmentManager#onRegionTransition() should account for the failure properly so that quota bookkeeping is consistent.
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