The introscope Enterprise Manager fails to startup
Article ID: 8977
Updated On:
Products
Issue/Introduction
You are unable to startup the Introscope Enterrise Manager, in the EM log you notice the below ERROR message:
..
11/21/17 12:12:36.161 PM CET [ERROR] [WrapperSimpleAppMain] [Manager] The EM failed to start. null
11/21/17 12:12:36.177 PM CET [INFO] [WrapperSimpleAppMain] [Manager] Shutting down data persistence subsystem
11/21/17 12:12:36.177 PM CET [INFO] [WrapperSimpleAppMain] [Manager] Shutting down the Isengard server
11/21/17 12:12:36.192 PM CET [INFO] [WrapperSimpleAppMain] [Manager] Orderly shutdown complete.
..
After enabling VERBOSE logging you notice the below NullPointerException:
11/21/17 12:12:36.161 PM CET [ERROR] [WrapperSimpleAppMain] [Manager] The EM failed to start. null
11/21/17 12:12:36.161 PM CET [VERBOSE] [WrapperSimpleAppMain] [Manager]
java.lang.NullPointerException
at org.garret.perst.impl.AltBtree$BtreeSelectionIterator.refresh(AltBtree.java:1357)
at org.garret.perst.impl.AltBtree$BtreeSelectionIterator.remove(AltBtree.java:1385)
at org.garret.perst.impl.PersistentMapImpl$1$1.remove(PersistentMapImpl.java:222)
at java.util.AbstractCollection.remove(AbstractCollection.java:293)
at java.util.AbstractSet.removeAll(AbstractSet.java:174)
at com.wily.introscope.server.enterprise.entity.transactiontrace.storage.GlobalMetaDataPerstStorage.removeKnownStorages(GlobalMetaDataPerstStorage.java:237)
at com.wily.introscope.server.enterprise.entity.transactiontrace.storage.MultiStorePerstStorage.removeManuallyDeletedStoragesFromIndex(MultiStorePerstStorage.java:822)
at com.wily.introscope.server.enterprise.entity.transactiontrace.storage.MultiStorePerstStorage.<init>(MultiStorePerstStorage.java:150)
at com.wily.introscope.server.enterprise.entity.transactiontrace.storage.TransactionTraceStorageSystem.<init>(TransactionTraceStorageSystem.java:434)
at com.wily.introscope.server.enterprise.entity.transactiontrace.storage.TransactionTraceStorageSystem.<init>(TransactionTraceStorageSystem.java:327)
at com.wily.introscope.server.enterprise.entity.transactiontrace.TransactionTraceEntity.<init>(TransactionTraceEntity.java:185)
at com.wily.introscope.server.enterprise.EnterpriseServer.initialize(EnterpriseServer.java:584)
at com.wily.introscope.server.enterprise.EnterpriseServer.doStart(EnterpriseServer.java:369)
..
Note: To enable VERBOSE level, open the <EM_HOME>/config/IntroscopeEnterpriseManager.properties, set log4j.logger.Manager=VERBOSE#com.wily.util.feedback.Log4JSeverityLevel,logfile
Cause
The above message is an indicator that the traces database is corrupted.
The cause of corruption could be an unexpected or unclean shutdown of the Introscope EM process
Environment
Resolution
Suggestion 1: Reindex the traces database
1) Stop the Introscope EM
2) Delete the EM_HOME/traces/index folder
3) Start the Introscope EM
Suggestion 2: If the problem persists, start the Introscope EM with a new Traces database
1) Stop the Introscope EM
2) Delete the EM_HOME/traces folder
3) Start the Introscope EM
Feedback
