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https://issues.apache.org/jira/browse/HBASE-11430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14046485#comment-14046485
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Enis Soztutar commented on HBASE-11430:
---------------------------------------
Some more context, we saw this in a big cluster in masters log:
{code}
2014-06-27 12:02:58,641 DEBUG [RpcServer.handler=58,port=16020]
master.ServerManager: RegionServer
hor10n08.gq1.ygridcore.net,16020,1403856435763 indicates a last flushed
sequence id (numberOfStores=1, numberOfStorefiles=0,
storefileUncompressedSizeMB=0, storefileSizeMB=0, memstoreSizeMB=0,
storefileIndexSizeMB=0, readRequestsCount=0, writeRequestsCount=0,
rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0,
totalCompactingKVs=0, currentCompactedKVs=0, compactionProgressPct=NaN,
completeSequenceId=2) that is less than the previous last flushed sequence id
(40000002) for region
IntegrationTestTimeBoundedRequestsWithRegionReplicas,11111100,1403857312477_0002.20ce78e6a77cb1ddd5b6e360784971f4.
Ignoring.
2014-06-27 12:02:58,644 DEBUG [RpcServer.handler=52,port=16020]
master.ServerManager: RegionServer
hor4n37.gq1.ygridcore.net,16020,1403856407099 indicates a last flushed sequence
id (numberOfStores=1, numberOfStorefiles=0, storefileUncompressedSizeMB=0,
storefileSizeMB=0, memstoreSizeMB=0, storefileIndexSizeMB=0,
readRequestsCount=0, writeRequestsCount=0, rootIndexSizeKB=0,
totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, totalCompactingKVs=0,
currentCompactedKVs=0, compactionProgressPct=NaN, completeSequenceId=2) that is
less than the previous last flushed sequence id (40000002) for region
IntegrationTestTimeBoundedRequestsWithRegionReplicas,049f49f0,1403857312477_0001.b21a19448b7c2f62a3ded3cfc2ddddb1.
Ignoring.
2014-06-27 12:02:58,644 DEBUG [RpcServer.handler=52,port=16020]
master.ServerManager: RegionServer
hor4n37.gq1.ygridcore.net,16020,1403856407099 indicates a last flushed sequence
id (numberOfStores=1, numberOfStorefiles=0, storefileUncompressedSizeMB=0,
storefileSizeMB=0, memstoreSizeMB=0, storefileIndexSizeMB=0,
readRequestsCount=0, writeRequestsCount=0, rootIndexSizeKB=0,
totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, totalCompactingKVs=0,
currentCompactedKVs=0, compactionProgressPct=NaN, completeSequenceId=2) that is
less than the previous last flushed sequence id (40000002) for region
IntegrationTestTimeBoundedRequestsWithRegionReplicas,aeeeee40,1403857312477_0001.cb4295b2b6abe2db1e04f1a249cc5667.
Ignoring.
{code}
+1 for patch.
> lastFlushSeqId has been updated wrongly during region open
> ----------------------------------------------------------
>
> Key: HBASE-11430
> URL: https://issues.apache.org/jira/browse/HBASE-11430
> Project: HBase
> Issue Type: Bug
> Components: MTTR
> Affects Versions: 0.99.0, 0.98.3
> Reporter: Jeffrey Zhong
> Assignee: Jeffrey Zhong
> Attachments: hbase-11430.patch
>
>
> In HRegion this.lastFlushSeqId is updated when opening a region which is
> wrong and will cause issue in distributedLogReplay recovery mode(not in log
> splitting mode) because its value is bumped up for log replay mode.
> This may cause data loss issue when we recover a region in
> distributedLogReplay mode while no flush for the region because no edits to
> be replayed. Later the region move to another region server and then future
> recovery will have issue because the large flush sequence Id value.
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