Title:     BookKeeper Documentation
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<h1>Release Notes - Bookkeeper - Version 4.2.3</h1>
                
<h2>        Bug
</h2>
<ul>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-602'>BOOKKEEPER-602</a>] -         we should have request timeouts rather than channel timeout in PerChannelBookieClient
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-673'>BOOKKEEPER-673</a>] -         Ledger length can be inaccurate in failure case
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-688'>BOOKKEEPER-688</a>] -         NPE exception in PerChannelBookieClient
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-708'>BOOKKEEPER-708</a>] -         Shade protobuf library to avoid incompatible versions
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-710'>BOOKKEEPER-710</a>] -         OpenLedgerNoRecovery should watch ensemble change.
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-711'>BOOKKEEPER-711</a>] -         bookkeeper-daemon.sh will not remove the pid file on successful stop
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-712'>BOOKKEEPER-712</a>] -         bookkeeper script should use &#39;java&#39; from JAVA_HOME
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-714'>BOOKKEEPER-714</a>] -         Logging channel exceptions in PerChannelBookieClient
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-725'>BOOKKEEPER-725</a>] -         AutoRecoveryMain should exit with error code if deathwatcher finds dead thread
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-726'>BOOKKEEPER-726</a>] -         PerChannelBookieClient should print address that it failed to connect to when it fails to correct
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-730'>BOOKKEEPER-730</a>] -         Shade pom file missing apache license header
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-742'>BOOKKEEPER-742</a>] -         Fix for empty ledgers losing quorum.
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-743'>BOOKKEEPER-743</a>] -         Periodic ledger check running too often as doc doesn&#39;t match implementation.
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-744'>BOOKKEEPER-744</a>] -         Run the auditor bookie check periodically
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-745'>BOOKKEEPER-745</a>] -         Fix for false reports of ledger unreplication during rolling restarts.
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-746'>BOOKKEEPER-746</a>] -         5 new shell commands. List ledgers, list metadata, list underreplicated, show auditor and simpletest
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-750'>BOOKKEEPER-750</a>] -         Flake in BookieAutoRecoveryTest#testEmptyLedgerLosesQuorumEventually
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-751'>BOOKKEEPER-751</a>] -         Ensure all the bookkeeper callbacks not run under ledger handle lock
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-752'>BOOKKEEPER-752</a>] -         Deadlock on NIOServer shutdown
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-755'>BOOKKEEPER-755</a>] -         Incorrect number of seconds specified in a day
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-765'>BOOKKEEPER-765</a>] -         bookkeeper script should fall back to java in path if JAVA_HOME is not set
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-766'>BOOKKEEPER-766</a>] -         Update notice.txt files to include 2014
</li>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-767'>BOOKKEEPER-767</a>] -         Allow loopback in tests
</li>
</ul>
                
<h2>        Improvement
</h2>
<ul>
<li>[<a href='https://issues.apache.org/jira/browse/BOOKKEEPER-747'>BOOKKEEPER-747</a>] -         Implement register/unregister LedgerMetadataListener in MSLedgerManagerFactory
</li>
</ul>
                                                    
