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Using JdbmCacheLoader
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created by <a href="https://community.jboss.org/people/c0ff75">Eugeny Balakhonov</a> in <i>JBoss Cache</i> - <a href="https://community.jboss.org/message/801763#801763">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hello!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I want to use JdbmCacheLoader in my configuration for a cache persistence. I have created simple config:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><?xml version="1.0" encoding="UTF-8"?></p><p><span><jbosscache xmlns:xsi="</span><a class="jive-link-external-small" href="http://www.w3.org/2001/XMLSchema-instance" rel="nofollow" target="_blank">http://www.w3.org/2001/XMLSchema-instance</a><span>"</span></p><p>            xmlns="urn:jboss:jbosscache-core:config:3.2"></p><p>    <loaders passivation="false" shared="false"></p><p>          <loader</p><p>                class="org.jboss.cache.loader.jdbm.JdbmCacheLoader"</p><p>                async="false"</p><p>                fetchPersistentState="true"</p><p>                ignoreModifications="false"</p><p>                purgeOnStartup="false"></p><p>            <properties></p><p>                location=D:/cache/#data</p><p>            </properties></p><p>        </loader> </p><p>    </loaders>   </p><p></jbosscache></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>But this isn't working:</p><p>1. After a first <span style="font-size: 10pt;">start</span><span style="font-size: 10pt;"> of </span><span style="font-size: 10pt;">application I see two DB files created in the directory d:/cache/.</span></p><p>2. I don't use cache during application run: I just start it and stop immediately.</p><p>3. During a second start of application I see a lot of errors. JBoss cache can't read persistence database which were created during first start. Generic reason: </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Caused by: jdbm.helper.WrappedRuntimeException: org.jboss.cache.loader.jdbm.JdbmFqnComparator</p><p>          at jdbm.helper.DefaultSerializer.deserialize(DefaultSerializer.java:99)</p><p>          at jdbm.recman.BaseRecordManager.fetch(BaseRecordManager.java:341)</p><p>          at jdbm.recman.CacheRecordManager.fetch(CacheRecordManager.java:263)</p><p>          at jdbm.recman.CacheRecordManager.fetch(CacheRecordManager.java:242)</p><p>          at jdbm.btree.BTree.load(BTree.java:276)</p><p>          at org.jboss.cache.loader.jdbm.JdbmCacheLoader.openDatabase(JdbmCacheLoader.java:186)</p><p>          at org.jboss.cache.loader.jdbm.JdbmCacheLoader.start(JdbmCacheLoader.java:157)</p><p>          at org.jboss.cache.loader.CacheLoaderManager.startCacheLoader(CacheLoaderManager.java:461)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>4. If I change in my config file JdbmCacheLoader to FileCacheLoader then cache works fine.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Where is my error in the configuration? How to correctly use JdbmCacheLoader ?</p><p>Please help me by good advice <span> ;) </span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Best regards,</p><p>Eugeny</p></div>
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