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From "Jeremiah Jordan (JIRA)" <>
Subject [jira] [Resolved] (CASSANDRA-7640) Seeing commit log grow unbounded
Date Tue, 29 Jul 2014 20:54:40 GMT


Jeremiah Jordan resolved CASSANDRA-7640.

    Resolution: Duplicate

> Seeing commit log grow unbounded
> --------------------------------
>                 Key: CASSANDRA-7640
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Jeremiah Jordan
>            Assignee: Benedict
>            Priority: Minor
>             Fix For: 2.0.10
> While running 2.0.6 saw the commit log size grow up to 30 GB before restarting the node,
with the max set to 1 GB.
> With DEBUG logging on CommitLog* we see segments are not being removed because they are
still dirty.  But for some reason the force flush when the active size is too large isn't
happening (The active size gets printed out, and is 20+GB).  The logs show normal "high volume"
flushes happening, and force flushes of system.* stuff happening.  But there are no flushes
occurring for the memtables that are keeping the segments dirty.
> Upon restart the commit log replays fine with no errors.  There are no errors from flushing
to the post flusher.  tpstats for both show 0 active 0 pending at times during.
> The only config change around this is that the segment size is larger than normal, it
is set to 128 MB, as there are some very large columns being inserted (30+MB).

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