[jboss-jira] [JBoss JIRA] Created: (JGRP-1223) STREAMING_STATE_TRANSFER abysmally slow

Tue Jun 29 10:53:46 EDT 2010

STREAMING_STATE_TRANSFER abysmally slow
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                 Key: JGRP-1223
                 URL: https://jira.jboss.org/browse/JGRP-1223
             Project: JGroups
          Issue Type: Bug
    Affects Versions: 2.8
         Environment: Windows XP
            Reporter: Kornelius Elstner
            Assignee: Bela Ban

With a relatively large shared state (anything in excess of a few MBytes) STREAMING_STATE_TRANSFER is very slow, it can take minutes for the state transfer to complete. The underlying issue is that STREAMING_STATE_TRANSFER.StreamingOutputStreamWrapper subclasses java.io.FilterOutputStream which always calls write(int b), even if buffers are to be written to the underlying socket.
As a consequence each byte to be transferred results in a call to write() to the underlying socket.
The fix is simple, the byte array variants of StreamingOutputStreamWrapper.write() should delegate to the wrapped socket directly.

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