[ZOOKEEPER-63] Race condition in client close() operation

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: java client
• Hadoop Flags: Reviewed
• Assignee: Patrick D. Hunt
• Reporter: Patrick D. Hunt
• Created: 30/Jun/08 22:08
• Updated: 26/Oct/08 01:10
• Resolved: 27/Aug/08 23:39

Description

There is a race condition in the java close operation on ZooKeeper.java.

Client is sending a disconnect request to the server. Server will close any open connections with the client when it receives this. If the client has not yet shutdown it's subthreads (event/send threads for example) these threads may consider the condition an error. We see this alot in the tests where the clients output error logs because they are unaware that a disconnection has been requested by the client.

Ben mentioned: perhaps we just have to change state to closed (on client) before sending disconnect request.

Issue Links

• is related to: ZOOKEEPER-86 intermittent test failure of org.apache.zookeeper.test.AsyncTest
• relates to: ZOOKEEPER-126 zookeeper client close operation may block indefinitely