解决flume运行中的一个异常问题！

今天在本地测试flume的exec  监控文件   分割的问题！！！遇到各种141异常问题！

怀疑是在切割文件的时候超过了监控文本的时间，导致flume异常退出，，，所以增加了keep-alive 时长，，，他的默认值是3秒，，我把它设置为30秒，，，之后运行，，，，他不再异常！！！

解决：设置agent1.channels.<channel_name>.keep-alive = 30

参考文章：问题2，，，，虽然前边的agent，方式可能不一样，但是这个关键的时间是一样的。

-------------------------------------------------以下是原文，原文地址：http://www.tuicool.com/articles/mmm2AvF

flume 问题分析与处理

时间 2014-03-30 11:50:18  CSDN博客

原文  http://blog.csdn.net/wangqiaoshi/article/details/22577975

主题 Flume

问题一：

org.apache.flume.EventDeliveryException:Failed to send events

atorg.apache.flume.sink.AbstractRpcSink.process(AbstractRpcSink.java:382)

atorg.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)

at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)

at java.lang.Thread.run(Thread.java:722)

Caused by:org.apache.flume.EventDeliveryException: NettyAvroRpcClient { host:10.95.198.123, port: 44444 }: Failed to send batch

at org.apache.flume.api.NettyAvroRpcClient.appendBatch(NettyAvroRpcClient.java:294)

atorg.apache.flume.sink.AbstractRpcSink.process(AbstractRpcSink.java:366)

... 3 more

Caused by:org.apache.flume.EventDeliveryException: NettyAvroRpcClient { host:10.95.198.123, port: 44444 }: Avro RPC call returned Status: FAILED

atorg.apache.flume.api.NettyAvroRpcClient.waitForStatusOK(NettyAvroRpcClient.java:370)

分析：

代码分析

try { 
      appendBatch(events, requestTimeout, TimeUnit.MILLISECONDS); 
    } catch (Throwable t) { 
      // we mark as no longer active without trying to clean up resources 
      // client is required to call close() to clean up resources 
      setState(ConnState.DEAD); 
      if (t instanceof Error) { 
        throw (Error) t; 
      } 
      if (t instanceof TimeoutException) { 
        throw new EventDeliveryException(this + ": Failed to send event. " + 
            "RPC request timed out after " + requestTimeout + " ms", t); 
      } 
      throw new EventDeliveryException(this + ": Failed to send batch", t);

请求超时,导致发送event失败

解决：

设置request-timeout长一点，默认20秒

问题二：

org.apache.flume.ChannelException: Unableto put batch on required channel: org.apache.flume.channel.MemoryChannel{name:woStoreSoftWDownloadC2}

atorg.apache.flume.channel.ChannelProcessor.processEventBatch(ChannelProcessor.java:200)

atorg.apache.flume.source.ExecSource$ExecRunnable.flushEventBatch(ExecSource.java:376)

atorg.apache.flume.source.ExecSource$ExecRunnable.run(ExecSource.java:336)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)

at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)

at java.util.concurrent.FutureTask.run(FutureTask.java:166)

atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)

atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)

at java.lang.Thread.run(Thread.java:722)

Caused by:org.apache.flume.ChannelException: Space for commit to queue couldn't beacquired Sinks are likely not keeping up with sources, or the buffer size istoo tight

atorg.apache.flume.channel.MemoryChannel$MemoryTransaction.doCommit(MemoryChannel.java:128)

atorg.apache.flume.channel.BasicTransactionSemantics.commit(BasicTransactionSemantics.java:151)

atorg.apache.flume.channel.ChannelProcessor.processEventBatch(ChannelProcessor.java:192)

... 8 more

30 Mar 2014 10:16:00,960 ERROR[timedFlushExecService18-0](org.apache.flume.source.ExecSource$ExecRunnable$1.run:322)  - Exception occured when processing eventbatch

org.apache.flume.ChannelException: Unableto put batch on required channel: org.apache.flume.channel.MemoryChannel{name:woStoreSoftWDownloadC2}

atorg.apache.flume.channel.ChannelProcessor.processEventBatch(ChannelProcessor.java:200)

atorg.apache.flume.source.ExecSource$ExecRunnable.flushEventBatch(ExecSource.java:376)

atorg.apache.flume.source.ExecSource$ExecRunnable.access$100(ExecSource.java:249)

at org.apache.flume.source.ExecSource$ExecRunnable$1.run(ExecSource.java:318)

atjava.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)

atjava.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)

at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)

at

代码分析：

protected void doCommit() throws InterruptedException { 
      int remainingChange = takeList.size() - putList.size(); 
      if(remainingChange < 0) { 
        if(!queueRemaining.tryAcquire(-remainingChange, keepAlive, TimeUnit.SECONDS)) { 
          throw new ChannelException("Space for commit to queue couldn't be acquired" + 
              " Sinks are likely not keeping up with sources, or the buffer size is too tight"); 
        } 
      } 
      int puts = putList.size(); 
      int takes = takeList.size(); 
      synchronized(queueLock) { 
        if(puts > 0 ) { 
          while(!putList.isEmpty()) { 
            if(!queue.offer(putList.removeFirst())) { 
              throw new RuntimeException("Queue add failed, this shouldn't be able to happen"); 
            } 
          } 
        } 
        putList.clear(); 
        takeList.clear(); 
      } 
      queueStored.release(puts); 
      if(remainingChange > 0) { 
        queueRemaining.release(remainingChange); 
      } 
      if (puts > 0) { 
        channelCounter.addToEventPutSuccessCount(puts); 
      } 
      if (takes > 0) { 
        channelCounter.addToEventTakeSuccessCount(takes); 
      } 
      channelCounter.setChannelSize(queue.size()); 
    }

等待keep-alive之后，还是没办法插入event

解决方案：

设置keep-alive(默认3秒) , capacity(100), transactionCapacity(100)大一点

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之后，前边的异常少了，，后边的异常是，，，产生消息快，命令消费慢！！！导致管道满！！！！

这个就需要对端加大管道的消费速度，来调整？？？，，，，，怀疑之，，，然后增大空间和传输空间！

-----------更改结果如下！

stage_nginx.channels.M1.capacity = 1000
stage_nginx.channels.M1.transactionCapacity = 1000
stage_nginx.channels.M1.keep-alive = 30

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