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Posted to issues@hbase.apache.org by "Andrew Purtell (JIRA)" <ji...@apache.org> on 2019/08/07 18:29:00 UTC
[jira] [Updated] (HBASE-22784) OldWALs not cleared in a replication
slave cluster (cyclic replication bw 2 clusters)
[ https://issues.apache.org/jira/browse/HBASE-22784?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrew Purtell updated HBASE-22784:
-----------------------------------
Priority: Blocker (was: Major)
Fix Version/s: 1.5.0
This at least impacts branch-1, which I want to immediately release 1.5.0 from (see my mail to dev@ today), so let me raise priority of this to blocker and set fix version to 1.5.0. Hopefully we can get a fix soon.
> OldWALs not cleared in a replication slave cluster (cyclic replication bw 2 clusters)
> -------------------------------------------------------------------------------------
>
> Key: HBASE-22784
> URL: https://issues.apache.org/jira/browse/HBASE-22784
> Project: HBase
> Issue Type: Bug
> Components: regionserver, Replication
> Affects Versions: 1.4.9, 1.4.10
> Reporter: Solvannan R M
> Assignee: Wellington Chevreuil
> Priority: Blocker
> Fix For: 1.5.0
>
>
> When a cluster is passive (receiving edits only via replication) in a cyclic replication setup of 2 clusters, OldWALs size keeps on growing. On analysing, we observed the following behaviour.
> # New entry is added to WAL (Edit replicated from other cluster).
> # ReplicationSourceWALReaderThread(RSWALRT) reads and applies the configured filters (due to cyclic replication setup, ClusterMarkingEntryFilter discards new entry from other cluster).
> # Entry is null, RSWALRT neither updates the batch stats (WALEntryBatch.lastWalPosition) nor puts it in the entryBatchQueue.
> # ReplicationSource thread is blocked in entryBachQueue.take().
> # So ReplicationSource#updateLogPosition has never invoked and WAL file is never cleared from ReplicationQueue.
> # Hence LogCleaner on the master, doesn't deletes the oldWAL files from hadoop.
> NOTE: When a new edit is added via hbase-client, ReplicationSource thread process and clears the oldWAL files from replication queues and hence master cleans up the WALs
> Please provide us a solution
>
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