[KYLIN-1352] 'Cache already exists' exception in high-concurrency query situation

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: v1.4.0
• Fix Version/s: v1.4.0
• Component/s: Query Engine
• Assignee: Dong Li
• Reporter: Dong Li
• Created: 21/Jan/16 02:29
• Updated: 17/Mar/16 07:37
• Resolved: 21/Jan/16 07:07

Description

Caused by: net.sf.ehcache.ObjectExistsException: Cache xxxxxxxxxxxxxx already exists
at net.sf.ehcache.CacheManager.addCacheNoCheck(CacheManager.java:1390)
at net.sf.ehcache.CacheManager.addCache(CacheManager.java:1274)
at net.sf.ehcache.CacheManager.addCache(CacheManager.java:1243)
at org.apache.kylin.storage.cache.AbstractCacheFledgedQuery.makeCacheIfNecessary(AbstractCacheFledgedQuery.java:106)
at org.apache.kylin.storage.cache.AbstractCacheFledgedQuery.<init>(AbstractCacheFledgedQuery.java:32)
at org.apache.kylin.storage.cache.CacheFledgedStaticQuery.<init>(CacheFledgedStaticQuery.java:25)
at org.apache.kylin.storage.hbase.HBaseStorage.wrapWithCache(HBaseStorage.java:108)
at org.apache.kylin.storage.hbase.HBaseStorage.createQuery(HBaseStorage.java:95)
at org.apache.kylin.storage.StorageFactory.createQuery(StorageFactory.java:50)
at org.apache.kylin.query.enumerator.OLAPEnumerator.queryStorage(OLAPEnumerator.java:124)
at org.apache.kylin.query.enumerator.OLAPEnumerator.moveNext(OLAPEnumerator.java:71)
at Baz$1$1.moveNext(Unknown Source)
at org.apache.calcite.linq4j.EnumerableDefaults.distinct(EnumerableDefaults.java:418)
at org.apache.calcite.linq4j.DefaultEnumerable.distinct(DefaultEnumerable.java:206)
at Baz.bind(Unknown Source)
at org.apache.calcite.jdbc.CalcitePrepare$CalciteSignature.enumerable(CalcitePrepare.java:281)
at org.apache.calcite.jdbc.CalciteConnectionImpl.enumerable(CalciteConnectionImpl.java:235)
at org.apache.calcite.jdbc.CalciteMetaImpl.createIterable(CalciteMetaImpl.java:533)
at org.apache.calcite.avatica.AvaticaResultSet.execute(AvaticaResultSet.java:184)
at org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:63)
at org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:42)
at org.apache.calcite.avatica.AvaticaConnection$1.execute(AvaticaConnection.java:473)
at org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:566)
at org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:477)
at org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:109)