[jira] [Created] (FLUME-2507) File Channel cannot support massive capacities

["Hari Shreedharan (JIRA)" <ji...@apache.org>]

Hari Shreedharan created FLUME-2507:
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             Summary: File Channel cannot support massive capacities
                 Key: FLUME-2507
                 URL: https://issues.apache.org/jira/browse/FLUME-2507
             Project: Flume
          Issue Type: Bug
            Reporter: Hari Shreedharan


In the File Channel, we map the checkpoint file. Java cannot seem to be able to map a single file of more than 2GB, since MappedByteBuffer is indexed on it. So even if we get a LongBuffer using asLongBuffer, the checkpointing will fail when the data is being put, with a nasty exception that looks like:
{code}
2014-10-16 13:48:54,684 (Log-BackgroundWorker-FileChannel1) [ERROR - org.apache.flume.channel.file.Log$BackgroundWorker.run(Log.java:1188)] General error in checkpoint worker
java.lang.IndexOutOfBoundsException
	at java.nio.Buffer.checkIndex(Buffer.java:512)
	at java.nio.DirectLongBufferS.put(DirectLongBufferS.java:270)
	at org.apache.flume.channel.file.EventQueueBackingStoreFile.checkpoint(EventQueueBackingStoreFile.java:269)
	at org.apache.flume.channel.file.FlumeEventQueue.checkpoint(FlumeEventQueue.java:145)
	at org.apache.flume.channel.file.Log.writeCheckpoint(Log.java:991)
	at org.apache.flume.channel.file.Log.writeCheckpoint(Log.java:968)
	at org.apache.flume.channel.file.Log.access$200(Log.java:75)
	at org.apache.flume.channel.file.Log$BackgroundWorker.run(Log.java:1183)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
	at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)
{code}



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