Jon Haddad created CASSANDRA-21065:
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Summary: ConcurrentModificationException during nodetool
garbagecollect with UnifiedCompactionStrategy and
only_purge_repaired_tombstones enabled
Key: CASSANDRA-21065
URL: https://issues.apache.org/jira/browse/CASSANDRA-21065
Project: Apache Cassandra
Issue Type: Bug
Components: Local/Compaction/UCS
Reporter: Jon Haddad
When running nodetool garbagecollect on a table configured with
UnifiedCompactionStrategy and only_purge_repaired_tombstones: true, a
ConcurrentModificationException is thrown. This occurs regardless of whether
any other repairs or compactions are running in parallel.
Failing configuration:
{noformat}
Compaction = {
'class': 'org.apache.cassandra.db.compaction.UnifiedCompactionStrategy',
'only_purge_repaired_tombstones': 'true',
'scaling_parameters': 'L10'
}
{noformat}
The issue has been reproduced across 3 separate clusters.
This stack trace is thrown when attempting to run nodetool garbagecollect:
{noformat}
error: null
-- StackTrace --
java.util.ConcurrentModificationException
at java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1597)
at java.base/java.util.HashMap$KeyIterator.next(HashMap.java:1620)
at
java.base/java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1055)
at
org.apache.cassandra.db.compaction.CompactionManager$6.filterSSTables(CompactionManager.java:691)
at
org.apache.cassandra.db.compaction.CompactionManager.lambda$parallelAllSSTableOperation$0(CompactionManager.java:441)
at
org.apache.cassandra.db.ColumnFamilyStore.withAllSSTables(ColumnFamilyStore.java:2940)
at
org.apache.cassandra.db.compaction.CompactionManager.parallelAllSSTableOperation(CompactionManager.java:432)
at
org.apache.cassandra.db.compaction.CompactionManager.performGarbageCollection(CompactionManager.java:683)
at
org.apache.cassandra.db.ColumnFamilyStore.garbageCollect(ColumnFamilyStore.java:1823)
at
org.apache.cassandra.service.StorageService.garbageCollect(StorageService.java:4285)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:72)
at jdk.internal.reflect.GeneratedMethodAccessor25.invoke(Unknown Source)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at java.base/sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:262)
at
java.management/com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:112)
at
java.management/com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:46)
at
java.management/com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:237)
at
java.management/com.sun.jmx.mbeanserver.PerInterface.invoke(PerInterface.java:138)
at
java.management/com.sun.jmx.mbeanserver.MBeanSupport.invoke(MBeanSupport.java:252)
at
java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:814)
at
java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:802)
at
java.management/com.sun.jmx.remote.security.MBeanServerAccessController.invoke(MBeanServerAccessController.java:472)
at
java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1472)
at
java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1310)
at
java.base/java.security.AccessController.doPrivileged(AccessController.java:712)
at
java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1412)
at
java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)
at java.base/jdk.internal.reflect.GeneratedMethodAccessor33.invoke(Unknown
Source)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:360)
at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
at
java.base/java.security.AccessController.doPrivileged(AccessController.java:712)
at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at
java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:587)
at
java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:828)
at
java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:705)
at
java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at
java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:704)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)
{noformat}
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