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  1. Cassandra
  2. CASSANDRA-6577

ConcurrentModificationException during nodetool netstats

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Low
    • Resolution: Fixed
    • Fix Version/s: 2.0.6
    • Component/s: Tool/nodetool
    • Environment:

      AWS EC2 machines,
      java version "1.7.0_45"
      Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
      Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
      Each node has 32 vnodes.

    • Severity:
      Low

      Description

      The node is leaving and I wanted to check its netstats, but it raises ConcurrentModificationException.

      [ubuntu@ip-10-4-202-48 :~]# /mnt/cassandra_latest/bin/nodetool netstats
      Mode: LEAVING
      Exception in thread "main" java.util.ConcurrentModificationException
      	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:926)
      	at java.util.HashMap$ValueIterator.next(HashMap.java:954)
      	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
      	at com.google.common.collect.Iterators.addAll(Iterators.java:357)
      	at com.google.common.collect.Lists.newArrayList(Lists.java:146)
      	at com.google.common.collect.Lists.newArrayList(Lists.java:128)
      	at org.apache.cassandra.streaming.management.SessionInfoCompositeData.toArrayOfCompositeData(SessionInfoCompositeData.java:161)
      	at org.apache.cassandra.streaming.management.SessionInfoCompositeData.toCompositeData(SessionInfoCompositeData.java:98)
      	at org.apache.cassandra.streaming.management.StreamStateCompositeData$1.apply(StreamStateCompositeData.java:82)
      	at org.apache.cassandra.streaming.management.StreamStateCompositeData$1.apply(StreamStateCompositeData.java:79)
      	at com.google.common.collect.Iterators$8.transform(Iterators.java:794)
      	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
      	at com.google.common.collect.Iterators.addAll(Iterators.java:357)
      	at com.google.common.collect.Lists.newArrayList(Lists.java:146)
      	at com.google.common.collect.Lists.newArrayList(Lists.java:128)
      	at org.apache.cassandra.streaming.management.StreamStateCompositeData.toCompositeData(StreamStateCompositeData.java:78)
      	at org.apache.cassandra.streaming.StreamManager$1.apply(StreamManager.java:87)
      	at org.apache.cassandra.streaming.StreamManager$1.apply(StreamManager.java:84)
      	at com.google.common.collect.Iterators$8.transform(Iterators.java:794)
      	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
      	at com.google.common.collect.Iterators.addAll(Iterators.java:357)
      	at com.google.common.collect.Sets.newHashSet(Sets.java:238)
      	at com.google.common.collect.Sets.newHashSet(Sets.java:218)
      	at org.apache.cassandra.streaming.StreamManager.getCurrentStreams(StreamManager.java:83)
      	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      	at java.lang.reflect.Method.invoke(Method.java:606)
      	at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:75)
      	at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
      	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      	at java.lang.reflect.Method.invoke(Method.java:606)
      	at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:279)
      	at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:112)
      	at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:46)
      	at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:237)
      	at com.sun.jmx.mbeanserver.PerInterface.getAttribute(PerInterface.java:83)
      	at com.sun.jmx.mbeanserver.MBeanSupport.getAttribute(MBeanSupport.java:206)
      	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:647)
      	at com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:678)
      	at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1464)
      	at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:97)
      	at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1328)
      	at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1420)
      	at javax.management.remote.rmi.RMIConnectionImpl.getAttribute(RMIConnectionImpl.java:657)
      	at sun.reflect.GeneratedMethodAccessor54.invoke(Unknown Source)
      	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      	at java.lang.reflect.Method.invoke(Method.java:606)
      	at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:322)
      	at sun.rmi.transport.Transport$1.run(Transport.java:177)
      	at sun.rmi.transport.Transport$1.run(Transport.java:174)
      	at java.security.AccessController.doPrivileged(Native Method)
      	at sun.rmi.transport.Transport.serviceCall(Transport.java:173)
      	at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:556)
      	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:811)
      	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:670)
      	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
      	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
      	at java.lang.Thread.run(Thread.java:724)
      

      The gossip info is as follows:

      /10.215.114.239
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        NET_VERSION:7
        LOAD:6.42655250606E11
        RELEASE_VERSION:2.0.1
        RACK:us-east-1c
        RPC_ADDRESS:0.0.0.0
        STATUS:NORMAL,-1305722878370288637
        HOST_ID:d13374d8-e4ae-466d-ad5a-44229a2fa190
        DC:pagedb-frontend
        SEVERITY:0.0
      /10.122.218.80
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        NET_VERSION:7
        LOAD:2.71405175303E11
        RELEASE_VERSION:2.0.1
        RACK:us-east-1a
        RPC_ADDRESS:0.0.0.0
        STATUS:NORMAL,-1796000685025988745
        HOST_ID:7746a875-1e53-4ebe-aef6-ad59fadd6ea7
        DC:pagedb-frontend
        SEVERITY:0.0
      /10.178.13.230
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        NET_VERSION:7
        LOAD:2.34997966591E11
        RELEASE_VERSION:2.0.1
        RACK:us-east-1d
        RPC_ADDRESS:0.0.0.0
        STATUS:LEAVING,-1646882803236172485
        HOST_ID:160d83bf-4cc0-4872-aec6-7908446eccbf
        DC:pagedb-backend
        SEVERITY:1.5584415197372437
      /10.71.141.179
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        NET_VERSION:7
        LOAD:2.21492186385E11
        RELEASE_VERSION:2.0.1
        RACK:us-east-1c
        RPC_ADDRESS:0.0.0.0
        STATUS:NORMAL,-1277850891915823266
        HOST_ID:baa81888-6417-4e7c-8d7b-2bb79c38ca40
        DC:pagedb-frontend
        SEVERITY:0.0
      /10.251.114.31
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        LOAD:2.95280061394E11
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        RACK:us-east-1b
        RPC_ADDRESS:0.0.0.0
        STATUS:NORMAL,-1866613386904756042
        HOST_ID:a71e7037-c4f8-4ff9-864d-e83b6d3037d7
        DC:pagedb-frontend
        SEVERITY:0.0
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        RPC_ADDRESS:0.0.0.0
        STATUS:NORMAL,-1896996972976095280
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        LOAD:1.46469437383E11
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        RPC_ADDRESS:0.0.0.0
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        STATUS:NORMAL,-1295072457639851651
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        RPC_ADDRESS:0.0.0.0
        STATUS:LEAVING,-1708596056219631840
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      /10.251.114.15
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        RACK:us-east-1b
        RPC_ADDRESS:0.0.0.0
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        DC:pagedb-frontend
        SEVERITY:0.0
      /10.97.135.32
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        LOAD:3.1249908096E11
        RELEASE_VERSION:2.0.1
        RACK:us-east-1c
        RPC_ADDRESS:0.0.0.0
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        SEVERITY:0.0
      /10.99.144.60
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        LOAD:8.9296442414E10
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        RPC_ADDRESS:0.0.0.0
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        HOST_ID:01b323c1-3f0e-40de-8ef7-3e1d33b391c5
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        SEVERITY:0.0
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        LOAD:1.95197366549E11
        RELEASE_VERSION:2.0.1
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        STATUS:NORMAL,-1188304416367949186
        HOST_ID:7a84853a-2c0a-448c-84e2-cceaa98c7523
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        SEVERITY:0.26178011298179626
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        NET_VERSION:7
        LOAD:9.8325409989E10
        RELEASE_VERSION:2.0.1
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        RPC_ADDRESS:0.0.0.0
        STATUS:NORMAL,-1168449340133292844
        HOST_ID:6480a3a2-cbbe-44f4-b67b-7310f885b307
        DC:pagedb-frontend
        SEVERITY:0.0
      /10.178.2.177
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        NET_VERSION:7
        LOAD:3.8547129498E11
        RELEASE_VERSION:2.0.1
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        RPC_ADDRESS:0.0.0.0
        STATUS:NORMAL,-1337943409437095727
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        DC:pagedb-frontend
        SEVERITY:0.0
      /10.201.206.166
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        NET_VERSION:7
        LOAD:2.02276920825E11
        RELEASE_VERSION:2.0.1
        RACK:us-east-1c
        RPC_ADDRESS:0.0.0.0
        STATUS:NORMAL,-2302424866842171501
        HOST_ID:f9651587-8f34-4dbc-af5c-64f19bc85ad6
        DC:pagedb-frontend
        SEVERITY:0.0
      /10.93.6.87
        SCHEMA:f9832569-f987-3545-8c36-196342655a7f
        NET_VERSION:7
        LOAD:5.55645040614E11
        RELEASE_VERSION:2.0.1
        RACK:us-east-1a
        RPC_ADDRESS:0.0.0.0
        STATUS:NORMAL,-1767037199861003446
        HOST_ID:2ca596b1-fa0a-40a8-ace1-bc7b21e82c45
        DC:pagedb-frontend
        SEVERITY:1.0230178833007812
      /10.123.74.248
        SCHEMA:b2c3e6ec-3b3f-3ad9-baef-e9e311a24eb9
        NET_VERSION:7
        LOAD:3.09054824961E11
        REMOVAL_COORDINATOR:REMOVER,76d339f4-ac4a-4f95-bada-1ec17f67f4e3
        RELEASE_VERSION:2.0.1
        RACK:us-east-1a
        RPC_ADDRESS:0.0.0.0
        STATUS:removed,94daf57d-838d-4285-8048-e60f97629dba,1389650189822
        HOST_ID:94daf57d-838d-4285-8048-e60f97629dba
        DC:pagedb-backend
        SEVERITY:0.2493765652179718
      /10.71.141.12
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        HOST_ID:4b9f63e5-8561-4e59-8011-e11fb3e8d627
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        STATUS:removed,73c27c92-1f3e-4628-9c91-a1e0a03a9e21,1389731586723
        DC:pagedb-backend
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        RPC_ADDRESS:0.0.0.0
        STATUS:NORMAL,-1102475930390387446
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        DC:pagedb-frontend
        SEVERITY:0.0
      /10.206.97.184
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        LOAD:2.34212215287E11
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        STATUS:LEAVING,-1397201050646007911
        DC:pagedb-backend
        SEVERITY:2.236421823501587
      /10.71.141.42
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        LOAD:6.0594679857E10
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        STATUS:NORMAL,-1008058669507434673
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        DC:pagedb-frontend
        SEVERITY:0.0
      /10.154.148.5
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        NET_VERSION:7
        LOAD:4.91232885735E11
        RELEASE_VERSION:2.0.1
        RACK:us-east-1d
        RPC_ADDRESS:0.0.0.0
        STATUS:NORMAL,-1261154574760184756
        HOST_ID:86642aef-f625-4561-be7b-ab8f58066294
        DC:pagedb-frontend
        SEVERITY:0.7672634720802307
      /10.183.153.179
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        RPC_ADDRESS:0.0.0.0
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        HOST_ID:811a2966-b6f0-41fd-ba29-fc980763a69c
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        Attachments

        1. 6577_SessionInfo.patch
          1 kB
          Joshua McKenzie
        2. 6577_TokenMetadata.patch
          1 kB
          Joshua McKenzie
        3. 6577_SessionInfo_v2.patch
          2 kB
          Joshua McKenzie
        4. 6577_SessionInfo_v3.patch
          1 kB
          Joshua McKenzie

          Activity

            People

            • Assignee:
              JoshuaMcKenzie Joshua McKenzie
              Reporter:
              shaochuan Shao-Chuan Wang
              Authors:
              Joshua McKenzie
              Reviewers:
              Tom Hobbs
            • Votes:
              0 Vote for this issue
              Watchers:
              3 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: