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https://issues.apache.org/jira/browse/CASSANDRA-715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12802305#action_12802305
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Jonathan Ellis commented on CASSANDRA-715:
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until this is fixed, running nodeprobe cleanup on each live node & restarting
it should fix this (by removing undelivered hints forcibly). depending on your
replication factor you may have hints that are not removed by cleanup; in that
case you can remove the hint files from data/system/*Hint*.
> HHOM goes into infinite loop, wasting cpu
> -----------------------------------------
>
> Key: CASSANDRA-715
> URL: https://issues.apache.org/jira/browse/CASSANDRA-715
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 0.6
> Environment: debian lenny amd64 OpenJDK 64-Bit Server VM (build
> 1.6.0_0-b11, mixed mode)
> Reporter: Brandon Williams
> Fix For: 0.6
>
>
> To replicate: take a host down, cause hints to it, wait for HHOM to kick in
> The issue is line 201 of HHOM:
> startColumn = keyColumn.name(); // repeating the last as the first is fine
> since we just deleted it
> That comment is false. The column may not have been deleted, since the
> endpoint could still be down. This causes HHOM to go into an infinite loop
> trying to deliver hints to a down host.
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