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https://issues.apache.org/jira/browse/BOOKKEEPER-684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13767419#comment-13767419
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Jiannan Wang commented on BOOKKEEPER-684:
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With this change, the log file size of GcLedgersTest reduces from 19M to 49K.
> ZK logging is oververbose, can cause oom in tests
> -------------------------------------------------
>
> Key: BOOKKEEPER-684
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-684
> Project: Bookkeeper
> Issue Type: Bug
> Reporter: Ivan Kelly
> Assignee: Jiannan Wang
> Priority: Trivial
> Fix For: 4.2.2
>
> Attachments: BOOKKEEPER-684.patch
>
>
> Some tests, GcLedgerTests for example, create a lot of ledgers (30k) which
> causes a lot of zk writes. This causes a lot of zk logging, which can fill
> the log buffer and cause an oom when you're running with very little memory.
> Fix is trivial. zk should be set to only log at error level in
> log4j.properties.
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