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https://issues.apache.org/jira/browse/CASSANDRA-6998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13963007#comment-13963007
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Scooletz commented on CASSANDRA-6998:
-------------------------------------
Thx [~iamaleksey] for your quick comment, I think this problem is not solved
yet though. In the comments section of the issue referenced by you
https://issues.apache.org/jira/browse/CASSANDRA-6666 [~gsanderson] asks:
{quote}
One quick question... this patch will hopefully prevent us getting into this
state in many cases, unless you have a huge number of hints for a node that is
down for a very long time: since there is no auto-compaction, a large number of
hints may have expired from TTL, thus preventing any further hint delivery.
{quote}
That's the case I'm referring to. I got this Is it covered by 6666? If not, is
it considered as a bug? I added stacktrace to the issue.
> HintedHandoff - expired hints may block future hints deliveries
> ---------------------------------------------------------------
>
> Key: CASSANDRA-6998
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6998
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: - cluster of two DCs: DC1, DC2
> - keyspace using NetworkTopologyStrategy (replication factors for both DCs)
> - heavy load (write:read, 100:1) with LOCAL_QUORUM using Java driver setup
> with DC awareness, writing to DC1
> Reporter: Scooletz
> Labels: HintedHandoff, TTL
> Fix For: 2.0.3
>
>
> For tests purposes, DC2 was shut down for 1 day. The _hints_ table was filled
> with millions of rows. Now, when _HintedHandOffManager_ tries to
> _doDeliverHintsToEndpoint_ it queries the store with
> QueryFilter.getSliceFilter which counts deleted (TTLed) cells and throws
> org.apache.cassandra.db.filter.TombstoneOverwhelmingException.
> Throwing this exception stops the manager from running compaction as it is
> run only after successful handoff. This leaves the HH practically disabled
> till administrator runs truncateAllHints.
> Wouldn't it be nicer if on
> org.apache.cassandra.db.filter.TombstoneOverwhelmingException run compaction?
> That would remove TTLed hints leaving whole HH mechanism in a healthy state.
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