[FLUME-2507] File Channel cannot support massive capacities

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Johny Rufus
• Reporter: Hari Shreedharan
• Created: 16/Oct/14 21:27
• Updated: 01/Mar/15 13:33

Description

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 int. So even if we get a LongBuffer using asLongBuffer (since that is only a view on the real buffer), the checkpointing will fail when the data is being put, with a nasty exception that looks like:

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)