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<title>Qpid Proton-J 0.30.0 Release Notes - Apache Qpid&#8482;</title>
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<h1 id="qpid-proton-j-0300-release-notes">Qpid Proton-J 0.30.0 Release Notes</h1>
<p>Proton is a high-performance, lightweight messaging library. More
about <a href="/proton/index.html">Qpid Proton</a>.</p>
<p>For more information about this release, including download links and
documentation, see the <a href="index.html">release overview</a>.</p>
<p><strong>Note</strong>: This release addresses security issue <a href="/cves/CVE-2018-17187.html">CVE-2018-17187</a>, around hostname verification mode not being implemented in the optional transport TLS wrapper. Uses of proton-j not using this layer (e.g use within Qpid JMS) are not impacted.</p>
<h2 id="new-features-and-improvements">New features and improvements</h2>
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<li><a href="https://issues.apache.org/jira/browse/PROTON-1925">PROTON-1925</a> - Add some enums to Section and DeliveryState to make type determination simpler</li>
<li><a href="https://issues.apache.org/jira/browse/PROTON-1941">PROTON-1941</a> - Add WritableBuffer API for requesting space when writing complex types</li>
<li><a href="https://issues.apache.org/jira/browse/PROTON-1948">PROTON-1948</a> - Refactor FrameWriter to avoid reencodes when buffer space is insufficient</li>
<li><a href="https://issues.apache.org/jira/browse/PROTON-1961">PROTON-1961</a> - Improve codec performance for certain common encoding operations</li>
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<h2 id="bugs-fixed">Bugs fixed</h2>
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<li><a href="https://issues.apache.org/jira/browse/PROTON-1938">PROTON-1938</a> - misaligned Transport set/getErrorCondition and closed() behaviour</li>
<li><a href="https://issues.apache.org/jira/browse/PROTON-1958">PROTON-1958</a> - incorrect ordering for reactor timer tasks with matching deadlines</li>
<li><a href="https://issues.apache.org/jira/browse/PROTON-1962">PROTON-1962</a> - [CVE-2018-17187] transport TLS wrapper hostname verification mode not implemented</li>
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