Benjamin Lerer created CASSANDRA-17163: ------------------------------------------
Summary: High CAS failures in MemtablePool.SubPool.tryAllocate Key: CASSANDRA-17163 URL: https://issues.apache.org/jira/browse/CASSANDRA-17163 Project: Cassandra Issue Type: Bug Reporter: Benjamin Lerer Assignee: Benjamin Lerer In a cluster using {{memtable_allocation_type: offheap_buffers}} which handle a high amount of writes we are seeing some high contentions on {{MemtablePool.SubPool.tryAllocate}}. {code}"MutationStage-561" #5457 daemon prio=5 os_prio=0 tid=0x00007f35dd3cfa50 nid=0x1407a runnable [0x00007f2357fd5000] java.lang.Thread.State: RUNNABLE at org.apache.cassandra.utils.memory.MemtablePool$SubPool.tryAllocate(MemtablePool.java:159) at org.apache.cassandra.utils.memory.MemtableAllocator$SubAllocator.allocate(MemtableAllocator.java:175) at org.apache.cassandra.utils.memory.SlabAllocator.allocate(SlabAllocator.java:89) at org.apache.cassandra.utils.memory.ContextAllocator.allocate(ContextAllocator.java:57) at org.apache.cassandra.utils.memory.ContextAllocator.clone(ContextAllocator.java:47) at org.apache.cassandra.db.rows.BufferCell.copy(BufferCell.java:140) at org.apache.cassandra.utils.memory.AbstractAllocator$CloningBTreeRowBuilder.addCell(AbstractAllocator.java:89) at org.apache.cassandra.db.rows.Rows.copy(Rows.java:49) at org.apache.cassandra.db.partitions.AtomicBTreePartition$RowUpdater.apply(AtomicBTreePartition.java:370) at org.apache.cassandra.db.partitions.AtomicBTreePartition$RowUpdater.apply(AtomicBTreePartition.java:333) at org.apache.cassandra.utils.btree.BTree.buildLeaf(BTree.java:195) at org.apache.cassandra.utils.btree.BTree.buildInternal(BTree.java:208) at org.apache.cassandra.utils.btree.BTree.buildInternal(BTree.java:227) at org.apache.cassandra.utils.btree.BTree.buildInternal(BTree.java:254) at org.apache.cassandra.utils.btree.BTree.build(BTree.java:177) at org.apache.cassandra.utils.btree.BTree.update(BTree.java:283) at org.apache.cassandra.db.partitions.AtomicBTreePartition.addAllWithSizeDeltaInternal(AtomicBTreePartition.java:143) at org.apache.cassandra.db.partitions.AtomicBTreePartition.addAllWithSizeDelta(AtomicBTreePartition.java:184) at org.apache.cassandra.db.Memtable.put(Memtable.java:295) at org.apache.cassandra.db.ColumnFamilyStore.apply(ColumnFamilyStore.java:1335) at org.apache.cassandra.db.CassandraTableWriteHandler.write(CassandraTableWriteHandler.java:40) at org.apache.cassandra.db.Keyspace.applyInternal(Keyspace.java:661) at org.apache.cassandra.db.Keyspace.apply(Keyspace.java:513) at org.apache.cassandra.db.Mutation.apply(Mutation.java:215) at org.apache.cassandra.db.Mutation.apply(Mutation.java:220) at org.apache.cassandra.db.Mutation.apply(Mutation.java:229) at org.apache.cassandra.service.StorageProxy$$Lambda$1019/640627333.run(Unknown Source) at org.apache.cassandra.service.StorageProxy$4.runMayThrow(StorageProxy.java:1544) at org.apache.cassandra.service.StorageProxy$LocalMutationRunnable$1.runMayThrow(StorageProxy.java:2314) at org.apache.cassandra.service.StorageProxy$HintRunnable.run(StorageProxy.java:2352) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:162) at org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$LocalSessionFutureTask.run(AbstractLocalAwareExecutorService.java:134) at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:119) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:748) Locked ownable synchronizers: - None {code} This issue is similar to CASSANDRA-15922. -- This message was sent by Atlassian Jira (v8.20.1#820001) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org