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https://issues.apache.org/jira/browse/CASSANDRA-3466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13147007#comment-13147007
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Brandon Williams commented on CASSANDRA-3466:
---------------------------------------------
I haven't been able to reproduce the assertion errors, but I did find what is
preventing hint delivery in some cases:
{noformat}
if (hintStore.getSSTables().isEmpty())
return; // nothing to do, don't confuse users by logging a no-op
handoff
{noformat}
If you're testing with a small enough amount of hints that the hints table
never flushes, we never deliver the hints in the current memtable.
> Hinted handoff not working after rolling upgrade from 0.8.7 to 1.0.2
> --------------------------------------------------------------------
>
> Key: CASSANDRA-3466
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3466
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 1.0.0
> Reporter: Jonas Borgström
> Assignee: Brandon Williams
> Labels: hintedhandoff
> Fix For: 1.0.3
>
>
> While testing rolling upgrades from 0.8.7 to 1.0.2 on a test cluster I've
> noticed that hinted hand-off didn't always work properly. Hints generated on
> an upgraded node does not seem to be delivered to other newly upgraded nodes
> once they rejoin the ring. They only way I've found to get a node to deliver
> its hints is to restart it.
> Here's some steps to reproduce this issue:
> 1. Install cassandra 0.8.7 on node1 and node2 using default settings.
> 2. Create keyspace foo with {replication_factor: 2}. Create column family bar
> 3. Shutdown node2
> 4. Insert data into bar and verify that HintsColumnFamily on node2 contains
> hints
> 5. Start node2 and verify that hinted handoff is performed and
> HintsColumnFamily becomes empty again.
> 6. Upgrade and restart node1
> 7. Shutdown node2
> 8. Insert data into bar and verify that HintsColumnFamily on node2 contains
> hints
> 9. Upgrade and start node2
> 10. Notice that hinted handoff is *not* performed when "node2" comes back.
> (Only if node1 is restarted)
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