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https://issues.apache.org/jira/browse/CASSANDRA-3387?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yang Yang updated CASSANDRA-3387:
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Attachment: 3387.diff
use cached value , do not call getLocalhost() every time when we try to
construct a hint
> unnecessary locking in hint path due to InetAddress.getLocalhost()
> ------------------------------------------------------------------
>
> Key: CASSANDRA-3387
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3387
> Project: Cassandra
> Issue Type: Bug
> Reporter: Yang Yang
> Priority: Minor
> Attachments: 3387.diff
>
>
> in tests we found locking contention also due to the following
> Stacks at 01:49:19 PM (uptime 10:54)
> MutationStage:62 [BLOCKED] CPU time: 0:06
> java.net.InetAddress.getLocalHost()
> org.apache.cassandra.utils.UUIDGen.getClockSeqAndNode()
> org.apache.cassandra.utils.UUIDGen.createTimeUUIDBytes(long)
> org.apache.cassandra.utils.UUIDGen.getTimeUUIDBytes()
> org.apache.cassandra.db.RowMutation.hintFor(RowMutation, ByteBuffer)
> org.apache.cassandra.service.StorageProxy$4.run()
> java.lang.Thread.run()
> we can easily change every getLocalHost() call to use a cached value
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