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88 lines
4.3 KiB
HTML
88 lines
4.3 KiB
HTML
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>DB_INCOMPLETE</title>
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<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB Upgrade Guide" />
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<link rel="up" href="upgrade_3_2_toc.html" title="Chapter 12. Upgrading Berkeley DB 3.1 applications to Berkeley DB 3.2" />
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<link rel="prev" href="upgrade_3_2_renumber.html" title="Logically renumbering records" />
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<link rel="next" href="upgrade_3_2_tx_recover.html" title="DB_ENV->set_tx_recover" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.2</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">DB_INCOMPLETE</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="upgrade_3_2_renumber.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 12. Upgrading Berkeley DB 3.1 applications to Berkeley DB 3.2</th>
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<td width="20%" align="right"> <a accesskey="n" href="upgrade_3_2_tx_recover.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="upgrade_3_2_incomplete"></a>DB_INCOMPLETE</h2>
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</div>
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</div>
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</div>
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<p>
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There are a number of functions that flush pages from the Berkeley DB shared memory buffer pool
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to disk. Most of those functions can potentially fail because a page that needs to be flushed
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is not currently available. However, this is not a hard failure and is rarely cause for
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concern. In the Berkeley DB 3.2 release, the C++ API (if that API is configured to throw
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exceptions) and the Java API have been changed so that this failure does not throw an exception,
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but rather returns a non-zero error code of <code class="literal">DB_INCOMPLETE</code>.
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</p>
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<p>
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The following C++ methods will return <code class="literal">DB_INCOMPLETE</code> rather than throw
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an exception:
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<a href="../api_reference/CXX/dbclose.html" class="olink">Db::close</a>,
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<a href="../api_reference/CXX/dbsync.html" class="olink">Db::sync</a>,
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<a href="../api_reference/CXX/mempsync.html" class="olink">DbEnv::memp_sync</a>,
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<a href="../api_reference/CXX/txncheckpoint.html" class="olink">DbEnv::txn_checkpoint</a>,
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and <a href="../api_reference/CXX/mempfsync.html" class="olink">DbMpoolFile::memp_fsync</a>.
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</p>
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<p>
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The following Java methods are now declared "public int" rather than "public void", and will
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return <code class="literal">Db.DB_INCOMPLETE</code> rather than throw an exception:
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<code class="methodname">Db.close()</code>, <code class="methodname">Db.sync()</code>, and
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<code class="methodname">DbEnv.checkpoint()</code>.
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</p>
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<p>
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It is likely that the only change required by any application will be those currently checking
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for a <code class="literal">DB_INCOMPLETE</code> return that has been encapsulated in an exception.
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</p>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="upgrade_3_2_renumber.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="upgrade_3_2_toc.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="upgrade_3_2_tx_recover.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">Logically renumbering records </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> DB_ENV->set_tx_recover</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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