Logstash fatal error: Not enough free disk space

PolterFox · August 9, 2018, 8:20am

Hey guys,

I have a problem with logstash, I have configured a persisted queue to process the events of logstash. This setup worked, but I increased the RAM from the system an restarted the server, since that Logstash throws me a uncommon error:

[2018-08-09T10:13:24,771][ERROR][logstash.agent           ] Failed to execute action {:action=>LogStash::PipelineAction::Create/pipeline_id:main, :exception=>"Java::JavaIo::IOException", :message=>"Not enough free disk space available to allocate persisted queue.", :backtrace=>["org.logstash.ackedqueue.Queue.ensureDiskAvailable(Queue.java:789)", "org.logstash.ackedqueue.Queue.open(Queue.java:212)", "org.logstash.ackedqueue.ext.JRubyAckedQueueExt.open(JRubyAckedQueueExt.java:96)", "org.logstash.ackedqueue.ext.JRubyWrappedAckedQueueExt.ruby_initialize(JRubyWrappedAckedQueueExt.java:37)", "org.logstash.ackedqueue.ext.JRubyWrappedAckedQueueExt$INVOKER$i$0$7$ruby_initialize.call(JRubyWrappedAckedQueueExt$INVOKER$i$0$7$ruby_initialize.gen)", "org.jruby.internal.runtime.methods.JavaMethod$JavaMethodN.call(JavaMethod.java:743)", "org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:298)", "org.jruby.runtime.callsite.CachingCallSite.callBlock(CachingCallSite.java:79)", "org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:83)", "org.jruby.RubyClass.newInstance(RubyClass.java:1022)", "org.jruby.RubyClass$INVOKER$i$newInstance.call(RubyClass$INVOKER$i$newInstance.gen)", "org.jruby.ir.targets.InvokeSite.invoke(InvokeSite.java:145)", "usr.share.logstash.logstash_minus_core.lib.logstash.queue_factory.RUBY$method$create$0(/usr/share/logstash/logstash-core/lib/logstash/queue_factory.rb:23)", "usr.share.logstash.logstash_minus_core.lib.logstash.queue_factory.RUBY$method$create$0$__VARARGS__(/usr/share/logstash/logstash-core/lib/logstash/queue_factory.rb)", "org.jruby.internal.runtime.methods.CompiledIRMethod.call(CompiledIRMethod.java:77)", "org.jruby.internal.runtime.methods.MixedModeIRMethod.call(MixedModeIRMethod.java:93)", "org.jruby.ir.targets.InvokeSite.invoke(InvokeSite.java:145)", "usr.share.logstash.logstash_minus_core.lib.logstash.pipeline.RUBY$method$initialize$0(/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:170)", "org.jruby.internal.runtime.methods.CompiledIRMethod.call(CompiledIRMethod.java:77)", "org.jruby.internal.runtime.methods.MixedModeIRMethod.call(MixedModeIRMethod.java:93)", "org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:298)", "org.jruby.runtime.callsite.CachingCallSite.callBlock(CachingCallSite.java:79)", "org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:83)", "org.jruby.RubyClass.newInstance(RubyClass.java:1022)", "org.jruby.RubyClass$INVOKER$i$newInstance.call(RubyClass$INVOKER$i$newInstance.gen)", "org.jruby.ir.targets.InvokeSite.invoke(InvokeSite.java:145)", "usr.share.logstash.logstash_minus_core.lib.logstash.pipeline_action.create.RUBY$method$execute$0(/usr/share/logstash/logstash-core/lib/logstash/pipeline_action/create.rb:40)", "usr.share.logstash.logstash_minus_core.lib.logstash.pipeline_action.create.RUBY$method$execute$0$__VARARGS__(/usr/share/logstash/logstash-core/lib/logstash/pipeline_action/create.rb)", "org.jruby.internal.runtime.methods.CompiledIRMethod.call(CompiledIRMethod.java:77)", "org.jruby.internal.runtime.methods.MixedModeIRMethod.call(MixedModeIRMethod.java:93)", "org.jruby.ir.targets.InvokeSite.invoke(InvokeSite.java:145)", "usr.share.logstash.logstash_minus_core.lib.logstash.agent.RUBY$block$converge_state$2(/usr/share/logstash/logstash-core/lib/logstash/agent.rb:305)", "org.jruby.runtime.CompiledIRBlockBody.callDirect(CompiledIRBlockBody.java:145)", "org.jruby.runtime.IRBlockBody.call(IRBlockBody.java:71)", "org.jruby.runtime.Block.call(Block.java:124)", "org.jruby.RubyProc.call(RubyProc.java:289)", "org.jruby.RubyProc.call(RubyProc.java:246)", "org.jruby.internal.runtime.RubyRunnable.run(RubyRunnable.java:104)", "java.lang.Thread.run(Thread.java:748)"]} 
[2018-08-09T10:13:24,916][FATAL][logstash.runner          ] An unexpected error occurred! {:error=>#<LogStash::Error: Don't know how to handle `Java::JavaIo::IOException` for `PipelineAction::Create<main>`>, :backtrace=>["/usr/share/logstash/logstash-core/lib/logstash/converge_result.rb:27:in `create'", "/usr/share/logstash/logstash-core/lib/logstash/converge_result.rb:67:in `add'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:317:in `block in converge_state'"]}
[2018-08-09T10:13:24,993][ERROR][org.logstash.Logstash    ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit

I dont know why logstash is throwing this error because I have more than 50GB availlable to store the persisted queue on disk.

Can anyone help?

Thanks
Best regards,
Robert

magnusbaeck · August 9, 2018, 8:42am

Which version of Logstash? What's the inode situation on that volume? An inode shortage will result in the same error as a space shortage.

PolterFox · August 9, 2018, 8:57am

I use Logstash 6.3.

Inode situation:
Inodes: 52426752
IUsed: 39496
IFree: 52387256

magnusbaeck · August 9, 2018, 10:02am

Okay, so that looks good. Can you enable debug logging? That'll enable the following log statement which includes the value of this.dirPath so that we can verify that it's actually checking the available space on the volume where you have 50 GB free:

github.com

elastic/logstash/blob/c6cd247ec335a7010502091964f569497616b3de/logstash-core/src/main/java/org/logstash/ackedqueue/Queue.java#L207




    // track the seqNum as we rebuild tail pages, prevent empty pages with a minSeqNum of 0 to reset seqNum
    if (cp.maxSeqNum() > this.seqNum) {
        this.seqNum = cp.maxSeqNum();
    }
}


// transform the head page into a tail page only if the headpage is non-empty
// in both cases it will be checkpointed to track any changes in the firstUnackedPageNum when reconstructing the tail pages


logger.debug("opening head page: {}, in: {}, with checkpoint: {}", headCheckpoint.getPageNum(), this.dirPath, headCheckpoint.toString());


PageIO pageIO = new MmapPageIOV2(headCheckpoint.getPageNum(), this.pageCapacity, this.dirPath);
pageIO.recover(); // optimistically recovers the head page data file and set minSeqNum and elementCount to the actual read/recovered data


ensureDiskAvailable(diskNeeded - (long)pageIO.getHead());


if (pageIO.getMinSeqNum() != headCheckpoint.getMinSeqNum() || pageIO.getElementCount() != headCheckpoint.getElementCount()) {
    // the recovered page IO shows different minSeqNum or elementCount than the checkpoint, use the page IO attributes


    logger.warn("recovered head data page {} is different than checkpoint, using recovered page information", headCheckpoint.getPageNum());

PolterFox · August 9, 2018, 10:39am

@magnusbaeck I have enabled debug logging, what type of information do you need now?

magnusbaeck · August 9, 2018, 11:00am

The log entry that begins with "opening head page", seen above.

PolterFox · August 9, 2018, 11:03am

Here ist the log entry:

[2018-08-09T12:52:42,133][DEBUG][org.logstash.ackedqueue.Queue] opening head page: 1603, in: /../data/queue/main, with checkpoint: pageNum=1603, firstUnackedPageNum=1603, firstUnackedSeqNum=54048970, minSeqNum=54036331, elementCount=12689, isFullyAcked=no

magnusbaeck · August 9, 2018, 11:17am

Is /data really the intended Logstash data directory? Are you using a relative path somewhere where an absolute path is expected?

PolterFox · August 9, 2018, 12:19pm

Yes data is the right directory and no I dont you a relative path to the data directory (where is a relative path expected?).

magnusbaeck · August 9, 2018, 1:06pm

Sorry, I meant absolute path (previous post updated). Assuming df /data/queue reports 50 GB free space I have no idea what's going on.

PolterFox · August 9, 2018, 1:36pm

1K-blocks
104802308

Used
15964016

Available
88838292

Use%
16%

PolterFox · August 29, 2018, 1:29pm

So there is no solution at this moment?

magnusbaeck · August 29, 2018, 2:02pm

As I said I have no idea what's going on.

system · September 26, 2018, 2:02pm

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