I'm seeing the occasional "deadlock" on some tests in calcite-core. The
top of the stacktrace seems to get stuck in the following:
"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)
or
"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)
Before I go digging in, does this ring any bells to anyone? It's
currently hanging here for over 5 minutes, but there is still heap
activity happening. Just took a dump with jvisualvm too. Will poke around.
- Josh
