cuijianwei created HBASE-7685:
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Summary: Closed socket connection can't be remove from SecureClient
Key: HBASE-7685
URL: https://issues.apache.org/jira/browse/HBASE-7685
Project: HBase
Issue Type: Bug
Components: security
Affects Versions: 0.94.3
Reporter: cuijianwei
We found many IOExceptions naming "Call # not added as the connection # is
closing" when using SecureClient to access hbase. From the source code of
SecureClient, we found there may be bug in close() method of SecureClient. The
following is the current logic in close() method of SecureClient：
// release the resources
// first thing to do;take the connection out of the connection list
synchronized (connections) {
if (connections.get(remoteId) == this) {
connections.remove(remoteId);
}
}
However, connections are managed by PoolMap； therefore, if more than one
connection are created for the same remoteId, the 'if condition' may not be
satisfied because the default PoolType is RoundRobin. This could be cause a
closing state connection can't be removed from connections, making new calls
which use such connections will always throws IOException naming "connection is
closing".
We can use logic from close() method of HBaseClient to resolve the problem:
// release the resources
// first thing to do;take the connection out of the connection list
synchronized (connections) {
connections.remove(remoteId, this);
}
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