[CASSANDRA-3387] unnecessary locking in hint path due to InetAddress.getLocalhost()

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 1.0.1
• Severity: Low
• Assignee: Yang Yang
• Reporter: Yang Yang

Authors

Yang Yang

Reviewers

Jonathan Ellis

• Created: 19/Oct/11 20:59
• Updated: 16/Apr/19 09:32
• Resolved: 20/Oct/11 16:36

Description

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