Mapreduce 在ignite map reduce任务中连接已关闭

环境：

ignite服务器：

具有内核2.6.32-431.el6.x86_64的centos6.5

点燃版本1.9

hadoop版本2.6.2

3个服务器节点，每个节点在启动时都设置了'-Xms16g-Xmx16g-server-XX:+AggressiveOpts-XX:MaxMetaspaceSize=256m'

我使用ignite map reduce运行map reduce测试作业。这项工作仅仅是得到每个人的平均人数。数据如下：

杰克0.35

汤姆0.78

莉莉0.92

杰克0.28

汤姆0.18

首先，我生成了一个100M行的数据集。大约2.53GB。这项工作大约在30秒内正确完成。然后我生成了一个10亿行的数据集，大约25.3GB。作业总是失败，但有例外。我试了好几次，结果都一样

ignite服务器节点引发以下异常：

[15:06:56,804][ERROR][sys-#2740%null%][GridTcpRestProtocol] Failed to process client request [ses=GridSelectorNioSessionImpl [worker=ByteBufferNioClientWorker [readBuf=java.nio.HeapByteBuffer[pos=549 lim=549 cap=8192], super=AbstractNioClientWorker [selector=sun.nio.ch.EPollSelectorImpl@1cba0431, idx=3, bytesRcvd=0, bytesSent=0, bytesRcvd0=0, bytesSent0=0, select=true, super=GridWorker [name=grid-nio-worker-tcp-rest-3, gridName=null, finished=false, isCancelled=false, hashCode=906881587, interrupted=false, runner=grid-nio-worker-tcp-rest-3-#50%null%]]], writeBuf=null, readBuf=null, inRecovery=null, outRecovery=null, super=GridNioSessionImpl [locAddr=/172.31.68.204:11211, rmtAddr=/172.31.68.202:39473, createTime=1493967985751, closeTime=1493968009502, bytesSent=2715, bytesRcvd=2641, bytesSent0=0, bytesRcvd0=0, sndSchedTime=1493968016794, lastSndTime=1493967998303, lastRcvTime=1493968009502, readsPaused=false, filterChain=FilterChain[filters=[GridNioCodecFilter [parser=GridTcpRestParser [jdkMarshaller=JdkMarshaller [], routerClient=false], directMode=false]], accepted=true]], msg=GridClientTaskRequest [taskName=o.a.i.i.processors.hadoop.proto.HadoopProtocolJobStatusTask, arg=HadoopProtocolTaskArguments []]]
class org.apache.ignite.IgniteCheckedException: Failed to send message (connection was closed): GridSelectorNioSessionImpl [worker=ByteBufferNioClientWorker [readBuf=java.nio.HeapByteBuffer[pos=549 lim=549 cap=8192], super=AbstractNioClientWorker [selector=sun.nio.ch.EPollSelectorImpl@1cba0431, idx=3, bytesRcvd=0, bytesSent=0, bytesRcvd0=0, bytesSent0=0, select=true, super=GridWorker [name=grid-nio-worker-tcp-rest-3, gridName=null, finished=false, isCancelled=false, hashCode=906881587, interrupted=false, runner=grid-nio-worker-tcp-rest-3-#50%null%]]], writeBuf=null, readBuf=null, inRecovery=null, outRecovery=null, super=GridNioSessionImpl [locAddr=/172.31.68.204:11211, rmtAddr=/172.31.68.202:39473, createTime=1493967985751, closeTime=1493968009502, bytesSent=2715, bytesRcvd=2641, bytesSent0=0, bytesRcvd0=0, sndSchedTime=1493968016794, lastSndTime=1493967998303, lastRcvTime=1493968009502, readsPaused=false, filterChain=FilterChain[filters=[GridNioCodecFilter [parser=GridTcpRestParser [jdkMarshaller=JdkMarshaller [], routerClient=false], directMode=false]], accepted=true]]
    at org.apache.ignite.internal.util.IgniteUtils.cast(IgniteUtils.java:7239)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.get0(GridFutureAdapter.java:170)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.get(GridFutureAdapter.java:119)
    at org.apache.ignite.internal.processors.rest.protocols.tcp.GridTcpRestNioListener$1$1.apply(GridTcpRestNioListener.java:264)
    at org.apache.ignite.internal.processors.rest.protocols.tcp.GridTcpRestNioListener$1$1.apply(GridTcpRestNioListener.java:261)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.notifyListener(GridFutureAdapter.java:271)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.listen(GridFutureAdapter.java:228)
    at org.apache.ignite.internal.processors.rest.protocols.tcp.GridTcpRestNioListener$1.apply(GridTcpRestNioListener.java:261)
    at org.apache.ignite.internal.processors.rest.protocols.tcp.GridTcpRestNioListener$1.apply(GridTcpRestNioListener.java:229)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.notifyListener(GridFutureAdapter.java:271)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.notifyListeners(GridFutureAdapter.java:259)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:389)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:355)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:332)
    at org.apache.ignite.internal.processors.rest.GridRestProcessor$2$1.apply(GridRestProcessor.java:158)
    at org.apache.ignite.internal.processors.rest.GridRestProcessor$2$1.apply(GridRestProcessor.java:155)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.notifyListener(GridFutureAdapter.java:271)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.notifyListeners(GridFutureAdapter.java:259)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:389)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:355)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:332)
    at org.apache.ignite.internal.util.future.GridFutureChainListener.applyCallback(GridFutureChainListener.java:78)
    at org.apache.ignite.internal.util.future.GridFutureChainListener.apply(GridFutureChainListener.java:70)
    at org.apache.ignite.internal.util.future.GridFutureChainListener.apply(GridFutureChainListener.java:30)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.notifyListener(GridFutureAdapter.java:271)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.notifyListeners(GridFutureAdapter.java:259)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:389)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:355)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:332)
    at org.apache.ignite.internal.processors.rest.handlers.task.GridTaskCommandHandler$2.apply(GridTaskCommandHandler.java:294)
    at org.apache.ignite.internal.processors.rest.handlers.task.GridTaskCommandHandler$2.apply(GridTaskCommandHandler.java:257)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.notifyListener(GridFutureAdapter.java:271)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.notifyListeners(GridFutureAdapter.java:259)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:389)
    at org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:355)
    at org.apache.ignite.internal.processors.task.GridTaskWorker.finishTask(GridTaskWorker.java:1579)
    at org.apache.ignite.internal.processors.task.GridTaskWorker.finishTask(GridTaskWorker.java:1547)
    at org.apache.ignite.internal.processors.task.GridTaskWorker.reduce(GridTaskWorker.java:1157)
    at org.apache.ignite.internal.processors.task.GridTaskWorker.onResponse(GridTaskWorker.java:942)
    at org.apache.ignite.internal.processors.task.GridTaskProcessor.processJobExecuteResponse(GridTaskProcessor.java:996)
    at org.apache.ignite.internal.processors.task.GridTaskProcessor$JobMessageListener.onMessage(GridTaskProcessor.java:1221)
    at org.apache.ignite.internal.managers.communication.GridIoManager.invokeListener(GridIoManager.java:1222)
    at org.apache.ignite.internal.managers.communication.GridIoManager.processRegularMessage0(GridIoManager.java:850)
    at org.apache.ignite.internal.managers.communication.GridIoManager.access$2100(GridIoManager.java:108)
    at org.apache.ignite.internal.managers.communication.GridIoManager$7.run(GridIoManager.java:790)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: Failed to send message (connection was closed): GridSelectorNioSessionImpl [worker=ByteBufferNioClientWorker [readBuf=java.nio.HeapByteBuffer[pos=549 lim=549 cap=8192], super=AbstractNioClientWorker [selector=sun.nio.ch.EPollSelectorImpl@1cba0431, idx=3, bytesRcvd=0, bytesSent=0, bytesRcvd0=0, bytesSent0=0, select=true, super=GridWorker [name=grid-nio-worker-tcp-rest-3, gridName=null, finished=false, isCancelled=false, hashCode=906881587, interrupted=false, runner=grid-nio-worker-tcp-rest-3-#50%null%]]], writeBuf=null, readBuf=null, inRecovery=null, outRecovery=null, super=GridNioSessionImpl [locAddr=/172.31.68.204:11211, rmtAddr=/172.31.68.202:39473, createTime=1493967985751, closeTime=1493968009502, bytesSent=2715, bytesRcvd=2641, bytesSent0=0, bytesRcvd0=0, sndSchedTime=1493968016794, lastSndTime=1493967998303, lastRcvTime=1493968009502, readsPaused=false, filterChain=FilterChain[filters=[GridNioCodecFilter [parser=GridTcpRestParser [jdkMarshaller=JdkMarshaller [], routerClient=false], directMode=false]], accepted=true]]
    at org.apache.ignite.internal.util.nio.GridNioServer.send0(GridNioServer.java:554)
    at org.apache.ignite.internal.util.nio.GridNioServer.send(GridNioServer.java:494)
    at org.apache.ignite.internal.util.nio.GridNioServer$HeadFilter.onSessionWrite(GridNioServer.java:3036)
    at org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedSessionWrite(GridNioFilterAdapter.java:118)
    at org.apache.ignite.internal.util.nio.GridNioCodecFilter.onSessionWrite(GridNioCodecFilter.java:94)
    at org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedSessionWrite(GridNioFilterAdapter.java:118)
    at org.apache.ignite.internal.util.nio.GridNioFilterChain$TailFilter.onSessionWrite(GridNioFilterChain.java:264)
    at org.apache.ignite.internal.util.nio.GridNioFilterChain.onSessionWrite(GridNioFilterChain.java:189)
    at org.apache.ignite.internal.util.nio.GridNioSessionImpl.send(GridNioSessionImpl.java:108)
    at org.apache.ignite.internal.processors.rest.protocols.tcp.GridTcpRestNioListener$1.apply(GridTcpRestNioListener.java:258)
    ... 40 more

作业客户端引发了以下异常：

java.io.IOException: Failed to get job status: job_1fbf9083-9a44-4be9-9199-695a97652dc2_0002
    at org.apache.ignite.internal.processors.hadoop.impl.proto.HadoopClientProtocol.getJobStatus(HadoopClientProtocol.java:197)
    at org.apache.hadoop.mapreduce.Job$1.run(Job.java:326)
    at org.apache.hadoop.mapreduce.Job$1.run(Job.java:323)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1656)
    at org.apache.hadoop.mapreduce.Job.updateStatus(Job.java:323)
    at org.apache.hadoop.mapreduce.Job.isComplete(Job.java:611)
    at org.apache.hadoop.mapreduce.Job.monitorAndPrintJob(Job.java:1357)
    at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1318)
    at com.tscloud.sdk.test.ignite.MRTest.run(MRTest.java:81)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
    at com.tscloud.sdk.test.ignite.MRTest.main(MRTest.java:53)
Caused by: class org.apache.ignite.internal.client.impl.connection.GridClientConnectionResetException: Failed to perform request (connection failed): /172.31.68.204:11211
    at org.apache.ignite.internal.client.impl.connection.GridClientConnection.getCloseReasonAsException(GridClientConnection.java:491)
    at org.apache.ignite.internal.client.impl.connection.GridClientNioTcpConnection.close(GridClientNioTcpConnection.java:339)
    at org.apache.ignite.internal.client.impl.connection.GridClientNioTcpConnection.close(GridClientNioTcpConnection.java:299)
    at org.apache.ignite.internal.client.impl.connection.GridClientConnectionManagerAdapter$NioListener.onDisconnected(GridClientConnectionManagerAdapter.java:630)
    at org.apache.ignite.internal.util.nio.GridNioFilterChain$TailFilter.onSessionClosed(GridNioFilterChain.java:253)
    at org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedSessionClosed(GridNioFilterAdapter.java:93)
    at org.apache.ignite.internal.util.nio.GridNioCodecFilter.onSessionClosed(GridNioCodecFilter.java:70)
    at org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedSessionClosed(GridNioFilterAdapter.java:93)
    at org.apache.ignite.internal.util.nio.GridNioServer$HeadFilter.onSessionClosed(GridNioServer.java:3005)
    at org.apache.ignite.internal.util.nio.GridNioFilterChain.onSessionClosed(GridNioFilterChain.java:147)
    at org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.close(GridNioServer.java:2306)
    at org.apache.ignite.internal.util.nio.GridNioServer$ByteBufferNioClientWorker.processRead(GridNioServer.java:929)
    at org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.processSelectedKeysOptimized(GridNioServer.java:2026)
    at org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.bodyInternal(GridNioServer.java:1863)
    at org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.body(GridNioServer.java:1568)
    at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110)
    at java.lang.Thread.run(Thread.java:745)

作业配置如下所示：

Configuration configuration = new Configuration();
configuration.set(MRConfig.FRAMEWORK_NAME, IgniteHadoopClientProtocolProvider.FRAMEWORK_NAME);
configuration.set(MRConfig.MASTER_ADDRESS, "172.31.68.202:11211");
configuration.set("fs.igfs.impl", "org.apache.ignite.hadoop.fs.v1.IgniteHadoopFileSystem");
configuration.set("fs.default.name", "igfs://igfs@172.31.68.202/");

在作业失败后，我使用ignitevisorcmd.sh检查了节点状态。所有服务器节点都正常，但有时其中一个节点服务器出现故障。我不知道它为什么会这样

感谢您的帮助

编辑（2017-05-16）： 我更改了hadoop core-site.xml并添加了hadoop.tmp.dir属性，如下所示

  <property>
    <name>hadoop.tmp.dir</name>
    <value>/data/hadoop/hadoop-2.6.2/tmp</value>
  </property>

hadoop.tmp.dir
/data/hadoop/hadoop-2.6.2/tmp

然后我重新格式化了hdfs并上传了25.3GB的数据文件。我成功地运行了测试。结果我的hdfs出了点问题。重新格式化namenode可以解决这个问题

在以上步骤之前，我尝试使用VisualVM检查jvm堆的使用情况

---

如果您的节点暂时关闭，那么一个作业将故障转移到另一个节点，或者在没有其他节点的情况下完全失败是合理的。我将检查您的网络是否未重置或关闭。此外，您应该检查节点之间是否存在任何软件防火墙（最好禁用操作系统防火墙）。

谢谢您的回复。网络还可以。并非每次其中一个节点停机时都会发生这种情况。对于较小的数据集，作业始终正确完成。您确定没有耗尽内存吗？没有。数据文件大约为25.3GB，服务器节点jvm堆的总容量为48GB，每个16GB。Allen，还有很多因素。请使用VisualVM或其他工具检查您是否存在内存问题。您还可以参考此页面来估计在Ignite中存储数据所需的内存量：@ValentinKulichenko我在日志中未看到其他异常。我将使用VisualVM再次检查。顺便问一下，ignite是否要求每个节点的堆大小大于数据文件大小？