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Re: RocksDB segfaults

Posted by Stephan Ewen on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/RocksDB-segfaults-tp12323p12324.html

Hi!

It looks like you are running the RocksDB state backend 1.1 (is still an old version packaged into your JAR file?)

This line indicates that: org.apache.flink.contrib.streaming.state.RocksDBStateBackend.performSemiAsyncSnapshot (the method does not exist in 1.2 any more)

Can you try and run 1.2 and see if that still occurs? In general, I cannot vouch 100% for RocksDBs JNI API, but in our 1.2 tests so far it was stable.

Stephan



On Wed, Mar 22, 2017 at 3:13 PM, Florian König <[hidden email]> wrote:
Hi,

I have experienced two crashes of Flink 1.2 by SIGSEGV, caused by something in RocksDB. What is the preferred way to report them? All I got at the moment are two hs_err_pid12345.log files. They are over 4000 lines long each. Is there anything significant that I should extract to help you guys and/or put into a JIRA ticket?

The first thing that came to my mind was the stack traces (see below). Anything else?

Thanks
Florian

----

Stack: [0x00007fec04341000,0x00007fec04442000],  sp=0x00007fec0443ff48,  free space=1019k
Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
J 10252  org.rocksdb.RocksDB.get(J[BIJ)[B (0 bytes) @ 0x00007fec925887cc [0x00007fec92588780+0x4c]
J 27241 C2 org.apache.flink.contrib.streaming.state.RocksDBValueState.value()Ljava/lang/Object; (78 bytes) @ 0x00007fec94010ca4 [0x00007fec940109c0+0x2e4]
j  com.micardo.backend.TransitionProcessor$2.getValue()Ljava/lang/Long;+7
j  com.micardo.backend.TransitionProcessor$2.getValue()Ljava/lang/Object;+1
J 38483 C2 org.apache.flink.runtime.metrics.dump.MetricDumpSerialization.serializeGauge(Ljava/io/DataOutput;Lorg/apache/flink/runtime/metrics/dump/QueryScopeInfo;Ljava/lang/String;Lorg/apache/flink/metrics/Gauge;)V (114 bytes) @ 0x00007fec918eabf0 [0x00007fec918eabc0+0x30]
J 38522 C2 org.apache.flink.runtime.metrics.dump.MetricDumpSerialization$MetricDumpSerializer.serialize(Ljava/util/Map;Ljava/util/Map;Ljava/util/Map;Ljava/util/Map;)Lorg/apache/flink/runtime/metrics/dump/MetricDumpSerialization$MetricSerializationResult; (471 bytes) @ 0x00007fec94eb6260 [0x00007fec94eb57a0+0xac0]
J 47531 C2 org.apache.flink.runtime.metrics.dump.MetricQueryService.onReceive(Ljava/lang/Object;)V (453 bytes) @ 0x00007fec95ca57a0 [0x00007fec95ca4da0+0xa00]
J 5815 C2 akka.actor.UntypedActor.aroundReceive(Lscala/PartialFunction;Ljava/lang/Object;)V (7 bytes) @ 0x00007fec91e3ae6c [0x00007fec91e3adc0+0xac]
J 5410 C2 akka.actor.ActorCell.invoke(Lakka/dispatch/Envelope;)V (104 bytes) @ 0x00007fec91d5bc44 [0x00007fec91d5b9a0+0x2a4]
J 6628 C2 scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(Lscala/concurrent/forkjoin/ForkJoinTask;)V (60 bytes) @ 0x00007fec9212d050 [0x00007fec9212ccc0+0x390]
J 40130 C2 scala.concurrent.forkjoin.ForkJoinWorkerThread.run()V (182 bytes) @ 0x00007fec923f8170 [0x00007fec923f7fc0+0x1b0]
v  ~StubRoutines::call_stub

--------------------------------------

Stack: [0x00007f167a5b7000,0x00007f167a6b8000],  sp=0x00007f167a6b5f40,  free space=1019k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C  [libstdc++.so.6+0xc026b]  std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&)+0xb
C  [librocksdbjni8426686507832168508.so+0x2f14ca]  rocksdb::BackupEngine::Open(rocksdb::Env*, rocksdb::BackupableDBOptions const&, rocksdb::BackupEngine**)+0x3a
C  [librocksdbjni8426686507832168508.so+0x180ad5]  Java_org_rocksdb_BackupEngine_open+0x25
J 50030  org.rocksdb.BackupEngine.open(JJ)J (0 bytes) @ 0x00007f16cb79aa36 [0x00007f16cb79a980+0xb6]
J 49809 C1 org.apache.flink.contrib.streaming.state.RocksDBStateBackend.performSemiAsyncSnapshot(JJ)Ljava/util/HashMap; (416 bytes) @ 0x00007f16cd2733d4 [0x00007f16cd2719a0+0x1a34]
J 51766 C2 org.apache.flink.contrib.streaming.state.RocksDBStateBackend.snapshotPartitionedState(JJ)Ljava/util/HashMap; (40 bytes) @ 0x00007f16cb40a1fc [0x00007f16cb40a1a0+0x5c]
J 50547 C2 org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.snapshotOperatorState(JJ)Lorg/apache/flink/streaming/runtime/tasks/StreamTaskState; (206 bytes) @ 0x00007f16cb8be89c [0x00007f16cb8be7e0+0xbc]
J 52232 C2 org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(JJ)Z (650 bytes) @ 0x00007f16cbfbbf60 [0x00007f16cbfbb540+0xa20]
J 52419 C2 org.apache.flink.streaming.runtime.io.BarrierBuffer.notifyCheckpoint(Lorg/apache/flink/runtime/io/network/api/CheckpointBarrier;)V (25 bytes) @ 0x00007f16cbdd2624 [0x00007f16cbdd25c0+0x64]
J 41649 C2 org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(Lorg/apache/flink/streaming/api/operators/OneInputStreamOperator;Ljava/lang/Object;)Z (439 bytes) @ 0x00007f16cc8aed5c [0x00007f16cc8add40+0x101c]
J 33374% C2 org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run()V (42 bytes) @ 0x00007f16cbdc21d0 [0x00007f16cbdc20c0+0x110]
j  org.apache.flink.streaming.runtime.tasks.StreamTask.invoke()V+301
j  org.apache.flink.runtime.taskmanager.Task.run()V+700
j  java.lang.Thread.run()V+11
v  ~StubRoutines::call_stub
V  [libjvm.so+0x68c616]
V  [libjvm.so+0x68cb21]
V  [libjvm.so+0x68cfc7]
V  [libjvm.so+0x723d80]
V  [libjvm.so+0xa69dcf]
V  [libjvm.so+0xa69efc]
V  [libjvm.so+0x91d9d8]
C  [libpthread.so.0+0x8064]  start_thread+0xc4

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
J 50030  org.rocksdb.BackupEngine.open(JJ)J (0 bytes) @ 0x00007f16cb79a9c4 [0x00007f16cb79a980+0x44]
J 49809 C1 org.apache.flink.contrib.streaming.state.RocksDBStateBackend.performSemiAsyncSnapshot(JJ)Ljava/util/HashMap; (416 bytes) @ 0x00007f16cd2733d4 [0x00007f16cd2719a0+0x1a34]
J 51766 C2 org.apache.flink.contrib.streaming.state.RocksDBStateBackend.snapshotPartitionedState(JJ)Ljava/util/HashMap; (40 bytes) @ 0x00007f16cb40a1fc [0x00007f16cb40a1a0+0x5c]
J 50547 C2 org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.snapshotOperatorState(JJ)Lorg/apache/flink/streaming/runtime/tasks/StreamTaskState; (206 bytes) @ 0x00007f16cb8be89c [0x00007f16cb8be7e0+0xbc]
J 52232 C2 org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(JJ)Z (650 bytes) @ 0x00007f16cbfbbf60 [0x00007f16cbfbb540+0xa20]
J 52419 C2 org.apache.flink.streaming.runtime.io.BarrierBuffer.notifyCheckpoint(Lorg/apache/flink/runtime/io/network/api/CheckpointBarrier;)V (25 bytes) @ 0x00007f16cbdd2624 [0x00007f16cbdd25c0+0x64]
J 41649 C2 org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(Lorg/apache/flink/streaming/api/operators/OneInputStreamOperator;Ljava/lang/Object;)Z (439 bytes) @ 0x00007f16cc8aed5c [0x00007f16cc8add40+0x101c]
J 33374% C2 org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run()V (42 bytes) @ 0x00007f16cbdc21d0 [0x00007f16cbdc20c0+0x110]
j  org.apache.flink.streaming.runtime.tasks.StreamTask.invoke()V+301
j  org.apache.flink.runtime.taskmanager.Task.run()V+700
j  java.lang.Thread.run()V+11
v  ~StubRoutines::call_stub




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