[CASSANDRA-13008] Add vm.max_map_count StartupCheck

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 3.0.11, 3.11.0
• Component/s: Local/Config
• Assignee: Jay Zhuang
• Reporter: Jay Zhuang

Authors

Jay Zhuang

Reviewers

Stefania Alborghetti

• Created: 06/Dec/16 19:41
• Updated: 16/Apr/19 09:30
• Resolved: 13/Feb/17 11:05

Description

It's recommended to set vm.max_map_count to 1048575 (CASSANDRA-3563)
When the max_map_count is low, it throws OOM exception, which is hard to link to the real issue of vm.max_map_count.
The problem happened when we tried to remove one node, all the other nodes in cluster crashed. As each node was trying to load more local SSTable files for streaming.

I would suggest to add a StartupCheck for max_map_count, at least it could give a warning message to help the debug.

ERROR [STREAM-IN-] JVMStabilityInspector.java:140 - JVM state determined to be unstable.  Exiting forcefully due to:
java.lang.OutOfMemoryError: Map failed
    at sun.nio.ch.FileChannelImpl.map0(Native Method) ~[na:1.8.0_112]
    at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:937) ~[na:1.8.0_112]
    at org.apache.cassandra.io.util.ChannelProxy.map(ChannelProxy.java:152) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.util.MmappedRegions$State.add(MmappedRegions.java:280) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.util.MmappedRegions$State.access$400(MmappedRegions.java:216) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.util.MmappedRegions.updateState(MmappedRegions.java:173) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.util.MmappedRegions.<init>(MmappedRegions.java:70) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.util.MmappedRegions.<init>(MmappedRegions.java:58) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.util.MmappedRegions.map(MmappedRegions.java:96) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.util.CompressedSegmentedFile.<init>(CompressedSegmentedFile.java:47) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.util.CompressedSegmentedFile$Builder.complete(CompressedSegmentedFile.java:132) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.util.SegmentedFile$Builder.complete(SegmentedFile.java:177) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.util.SegmentedFile$Builder.buildData(SegmentedFile.java:193) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.sstable.format.big.BigTableWriter.openFinal(BigTableWriter.java:276) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.sstable.format.big.BigTableWriter.access$600(BigTableWriter.java:50) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.sstable.format.big.BigTableWriter$TransactionalProxy.doPrepare(BigTableWriter.java:313) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.prepareToCommit(Transactional.java:173) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.finish(Transactional.java:184) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.sstable.format.SSTableWriter.finish(SSTableWriter.java:213) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.io.sstable.SimpleSSTableMultiWriter.finish(SimpleSSTableMultiWriter.java:56) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.streaming.StreamReceiveTask.received(StreamReceiveTask.java:109) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.streaming.StreamSession.receive(StreamSession.java:599) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.streaming.StreamSession.messageReceived(StreamSession.java:482) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at org.apache.cassandra.streaming.ConnectionHandler$IncomingMessageHandler.run(ConnectionHandler.java:296) ~[apache-cassandra-3.0.10.jar:3.0.10]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_112]