[CALCITE-1053] Test occasionally hanging around use of ReflectiveRelMetadataProvider

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.6.0
• Component/s: core
• Assignee: Vladimir Sitnikov
• Reporter: Josh Elser
• Created: 12/Jan/16 22:31
• Updated: 21/Jan/16 22:20
• Resolved: 13/Jan/16 16:40

Description

I've started seeing some tests (JdbcTest and JdbcFrontLinqBackTest) in calcite-core hanging now and again:

"pool-1-thread-1" prio=5 tid=0x00007fd50611e800 nid=0x5103 runnable [0x0000000115b81000]
   java.lang.Thread.State: RUNNABLE
    at java.util.HashMap.getEntry(HashMap.java:465)
    at java.util.HashMap.get(HashMap.java:417)
    at org.apache.calcite.rel.metadata.ReflectiveRelMetadataProvider.apply(ReflectiveRelMetadataProvider.java:289)
    at org.apache.calcite.rel.metadata.ReflectiveRelMetadataProvider.apply(ReflectiveRelMetadataProvider.java:278)
    at org.apache.calcite.rel.metadata.ChainedRelMetadataProvider.apply(ChainedRelMetadataProvider.java:63)
    at org.apache.calcite.rel.metadata.ChainedRelMetadataProvider.apply(ChainedRelMetadataProvider.java:63)
    at org.apache.calcite.rel.metadata.ChainedRelMetadataProvider.apply(ChainedRelMetadataProvider.java:63)
    at org.apache.calcite.rel.metadata.MetadataFactoryImpl$2.load(MetadataFactoryImpl.java:57)
    at org.apache.calcite.rel.metadata.MetadataFactoryImpl$2.load(MetadataFactoryImpl.java:54)
    at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3599)
    at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2379)
    at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2342)
    - locked <0x00000007e1287590> (a com.google.common.cache.LocalCache$StrongEntry)
    at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2257)
    at com.google.common.cache.LocalCache.get(LocalCache.java:4000)
    at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4004)
    at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4874)
    at org.apache.calcite.rel.metadata.MetadataFactoryImpl.query(MetadataFactoryImpl.java:71)
    at org.apache.calcite.rel.AbstractRelNode.metadata(AbstractRelNode.java:296)
    at org.apache.calcite.rel.metadata.RelMetadataQuery.getNonCumulativeCost(RelMetadataQuery.java:140)

"pool-1-thread-6" prio=5 tid=0x00007fd50684c000 nid=0x5d03 runnable [0x0000000116193000]
   java.lang.Thread.State: RUNNABLE
    at java.util.HashMap.put(HashMap.java:494)
    at org.apache.calcite.rel.metadata.ReflectiveRelMetadataProvider.apply(ReflectiveRelMetadataProvider.java:292)
    at org.apache.calcite.rel.metadata.ReflectiveRelMetadataProvider.apply(ReflectiveRelMetadataProvider.java:278)
    at org.apache.calcite.rel.metadata.ChainedRelMetadataProvider.apply(ChainedRelMetadataProvider.java:63)
    at org.apache.calcite.rel.metadata.ChainedRelMetadataProvider.apply(ChainedRelMetadataProvider.java:63)
    at org.apache.calcite.rel.metadata.MetadataFactoryImpl$2.load(MetadataFactoryImpl.java:57)
    at org.apache.calcite.rel.metadata.MetadataFactoryImpl$2.load(MetadataFactoryImpl.java:54)
    at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3599)
    at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2379)
    at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2342)
    - locked <0x00000007a0fa41a0> (a com.google.common.cache.LocalCache$StrongEntry)
    at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2257)
    at com.google.common.cache.LocalCache.get(LocalCache.java:4000)
    at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4004)
    at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4874)
    at org.apache.calcite.rel.metadata.MetadataFactoryImpl.query(MetadataFactoryImpl.java:71)
    at org.apache.calcite.rel.AbstractRelNode.metadata(AbstractRelNode.java:296)
    at org.apache.calcite.rel.metadata.RelMetadataQuery.getNonCumulativeCost(RelMetadataQuery.java:140)