[jira] [Created] (OAK-7709) Persistent cache files locked on restart of DocumentNodeStore

["Jörg Hoh (JIRA)" <ji...@apache.org>]

Jörg Hoh created OAK-7709:
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             Summary: Persistent cache files locked on restart of DocumentNodeStore
                 Key: OAK-7709
                 URL: https://issues.apache.org/jira/browse/OAK-7709
             Project: Jackrabbit Oak
          Issue Type: Improvement
    Affects Versions: 1.8.2
         Environment: * Linux
* IBM JDK 8
            Reporter: Jörg Hoh


During a maintenance of our database system the DocumentNodeStore bundle shut down because of a lease timeout. When we restart the bundle, we ran into these exceptions:

{code}
16.08.2018 11:32:44.139 *INFO* [Default Executor-thread-20544] org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreService Configuring persistent cache to only cache nodes under paths [/libs, /apps, /jcr:system/jcr:nodeTypes, /jcr:system/rep:namespaces]
16.08.2018 11:32:44.155 *INFO* [Default Executor-thread-20544] org.apache.jackrabbit.oak.plugins.document.persistentCache.PersistentCache start, url=/opt/aem/repository/sling/_cqa/cache,size=2048,binary=0
16.08.2018 11:32:44.156 *WARN* [Default Executor-thread-20544] org.apache.jackrabbit.oak.plugins.document.persistentCache.MapFactory Error in the background thread of the persistent cache: java.lang.IllegalStateException: The file is locked: nio:/opt/aem/repository/sling/_cqa/cache/cache-0.data [1.4.194/7]
16.08.2018 11:32:44.157 *WARN* [Default Executor-thread-20544] org.apache.jackrabbit.oak.plugins.document.persistentCache.MapFactory Could not open the store /opt/aem/repository/sling/_cqa/cache/cache-0.data
java.lang.IllegalStateException: The file is locked: nio:/opta/em/repository/sling/_cqa/cache/cache-0.data [1.4.194/7]
at org.h2.mvstore.DataUtils.newIllegalStateException(DataUtils.java:765)
at org.h2.mvstore.FileStore.open(FileStore.java:168)
at org.h2.mvstore.MVStore.<init>(MVStore.java:347)
at org.h2.mvstore.MVStore$Builder.open(MVStore.java:2930)
at org.apache.jackrabbit.oak.plugins.document.persistentCache.PersistentCache$1.openStore(PersistentCache.java:288)
at org.apache.jackrabbit.oak.plugins.document.persistentCache.PersistentCache.createMapFactory(PersistentCache.java:361)
at org.apache.jackrabbit.oak.plugins.document.persistentCache.PersistentCache.<init>(PersistentCache.java:210)
at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBuilder.getPersistentCache(DocumentNodeStoreBuilder.java:648)
at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBuilder.buildCache(DocumentNodeStoreBuilder.java:627)
at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBuilder.buildDocumentCache(DocumentNodeStoreBuilder.java:586)
at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBuilder.buildNodeDocumentCache(DocumentNodeStoreBuilder.java:594)
at org.apache.jackrabbit.oak.plugins.document.rdb.RDBDocumentStore.initialize(RDBDocumentStore.java:967)
{code}

It seems that the mvstore wasn't shut down properly during the stop of the DocumentNodeStore. For me it seems that the DocumentNodeStore doesn't use the persistent cache anymore until there was a "hard" restart (on the JVM).

It would be good if even in this situation the shutdown of the DocumentNodeStore could drop the lock on the mvstore, so a clean restart of the bundle is possible.



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