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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1056) Multi-node RPC deadlocks during block recovery
Date Sun, 21 Mar 2010 10:13:27 GMT
Multi-node RPC deadlocks during block recovery
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                 Key: HDFS-1056
                 URL: https://issues.apache.org/jira/browse/HDFS-1056
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: data-node
    Affects Versions: 0.20.2, 0.21.0, 0.22.0
            Reporter: Todd Lipcon


Believe it or not, I'm seeing HADOOP-3657 / HADOOP-3673 in a 5-node 0.20 cluster. I have many
concurrent writes on the cluster, and when I kill a DN, some percentage of the time I get
one of these cross-node deadlocks among 3 of the nodes (replication 3). All of the DN RPC
server threads are tied up waiting on RPC clients to other datanodes.

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