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Posted to hdfs-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2012/05/05 23:11:50 UTC
[jira] [Created] (HDFS-3376) DFSClient fails to make connection to
DN if there are many unusable cached sockets
Todd Lipcon created HDFS-3376:
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Summary: DFSClient fails to make connection to DN if there are many unusable cached sockets
Key: HDFS-3376
URL: https://issues.apache.org/jira/browse/HDFS-3376
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs client
Affects Versions: 2.0.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Critical
After fixing the datanode side of keepalive to properly disconnect stale clients, (HDFS-3357), the client side has the following issue: when it connects to a DN, it first tries to use cached sockets, and will try a configurable number of sockets from the cache. If there are more cached sockets than the configured number of retries, and all of them have been closed by the datanode side, then the client will throw an exception and mark the replica node as dead.
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