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https://issues.apache.org/jira/browse/ZOOKEEPER-519?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mahadev konar updated ZOOKEEPER-519:
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Status: Patch Available (was: Open)
> Followerhandler should close the socket if it gets an exception on a write.
> ---------------------------------------------------------------------------
>
> Key: ZOOKEEPER-519
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-519
> Project: Zookeeper
> Issue Type: Bug
> Reporter: Mahadev konar
> Assignee: Mahadev konar
> Fix For: 3.3.0
>
> Attachments: ZOOKEEPER-519.patch
>
>
> We noticed this in our tests -
> {code}
> java.net.SocketException: Broken pipe
> at java.net.SocketOutputStream.socketWrite0(Native Method)
> at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
> at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
> at java.io.BufferedOutputStream.write(BufferedOutputStream.java:105)
> at java.io.DataOutputStream.write(DataOutputStream.java:90)
> at java.io.FilterOutputStream.write(FilterOutputStream.java:80)
> at
> org.apache.jute.BinaryOutputArchive.writeBuffer(BinaryOutputArchive.java:122)
> at org.apache.zookeeper.server.DataNode.serialize(DataNode.java:126)
> at
> org.apache.jute.BinaryOutputArchive.writeRecord(BinaryOutputArchive.java:126)
> at
> org.apache.zookeeper.server.DataTree.serializeNode(DataTree.java:878)
> at
> org.apache.zookeeper.server.DataTree.serializeNode(DataTree.java:890)
> at
> org.apache.zookeeper.server.DataTree.serializeNode(DataTree.java:890)
> at
> org.apache.zookeeper.server.DataTree.serializeNode(DataTree.java:890)
> at
> org.apache.zookeeper.server.DataTree.serializeNode(DataTree.java:890)
> at
> org.apache.zookeeper.server.DataTree.serializeNode(DataTree.java:890)
> at org.apache.zookeeper.server.DataTree.serialize(DataTree.java:940)
> at
> org.apache.zookeeper.server.util.SerializeUtils.serializeSnapshot(SerializeUtils.java:102)
> at
> org.apache.zookeeper.server.ZooKeeperServer.serializeSnapshot(ZooKeeperServer.java:269)
> at
> org.apache.zookeeper.server.quorum.FollowerHandler.run(FollowerHandler.java:263)
> {code}
> So the followerhandler got an exception while writing to the socket but the
> follower was still waiting on the socket for a read and got a read timeout
> after 60 seconds or so. To just make sure we handle this rightly, we should
> close the socket at the followerhandler when we get an excpetion, so that the
> follower immediately recognizes that its disconnected from the leader.
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