Sandro,

We had these same errors on version 0.92, but after reading the release
notes for 0.92.1 I disabled the output buffer and then restarted graylog2.

disable_output_cache = true

Now I don't get the messages anymore!

Did you restart the graylog2 service after disabling the output cache?

sudo service graylog2-server restart

Cheers!

Tristan



On Wed, Dec 10, 2014 at 6:06 AM, Sandro Roth <[email protected]> wrote:

> We are seeing the same issue. Deleted buffer files and disabled output
> buffer, but that didn't help..
> Let's hope they fixed this in 0.92.1
>
>
> On Monday, December 8, 2014 2:12:10 PM UTC+1, Razvan Grigore wrote:
>>
>> We have the same problem, after updating to 0.92, some at startup:
>>
>> 2014-12-08T13:54:55.590+01:00 ERROR [MasterCacheWorkerThread] Error while
>> trying to work on MasterCache <org.graylog2.caches.
>> DiskJournalCache.Output>.
>> java.lang.NullPointerException
>>         at org.mapdb.Queues$SimpleQueue.peek(Queues.java:117)
>>         at org.mapdb.Queues$SimpleQueue.isEmpty(Queues.java:287)
>>         at org.graylog2.caches.DiskJournalCache.isEmpty(
>> DiskJournalCache.java:238)
>>         at org.graylog2.periodical.MasterCacheWorkerThread.work(
>> MasterCacheWorkerThread.java:106)
>>         at org.graylog2.periodical.MasterCacheWorkerThread.access$200(
>> MasterCacheWorkerThread.java:43)
>>         at org.graylog2.periodical.MasterCacheWorkerThread$2.run(
>> MasterCacheWorkerThread.java:87)
>>         at java.lang.Thread.run(Thread.java:745)
>> 2014-12-08T13:54:57.101+01:00 ERROR [AbstractCacheWorkerThread] Exception
>> while working on cache:
>> java.lang.NullPointerException
>>         at org.mapdb.Queues$SimpleQueue.poll(Queues.java:135)
>>         at org.mapdb.Queues$SimpleQueue.drainTo(Queues.java:271)
>>         at org.graylog2.caches.DiskJournalCache.drainTo(
>> DiskJournalCache.java:207)
>>         at org.graylog2.periodical.AbstractCacheWorkerThread.
>> drainMessagesEnqueue(AbstractCacheWorkerThread.java:79)
>>         at org.graylog2.periodical.AbstractCacheWorkerThread.work(
>> AbstractCacheWorkerThread.java:58)
>>         at org.graylog2.periodical.OutputCacheWorkerThread$1.run(
>> OutputCacheWorkerThread.java:60)
>>         at java.lang.Thread.run(Thread.java:745)
>>
>> ... but also a shorter one all the time, each few seconds:
>>
>>
>> 2014-12-08T13:56:47.912+01:00 ERROR [MasterCacheWorkerThread] Error while
>> trying to work on MasterCache <org.graylog2.caches.
>> DiskJournalCache.Output>.
>> java.lang.NullPointerException
>> 2014-12-08T13:56:57.332+01:00 ERROR [MasterCacheWorkerThread] Error while
>> trying to work on MasterCache <org.graylog2.caches.
>> DiskJournalCache.Output>.
>> java.lang.NullPointerException
>> 2014-12-08T13:57:17.003+01:00 ERROR [AbstractCacheWorkerThread] Exception
>> while working on cache:
>> java.lang.NullPointerException
>>
>> I already tried to delete the contents of that folder and restart the
>> graylog-server, but still the same.
>>
>> Razvan
>>
>>
>> On Tuesday, December 2, 2014 11:44:53 AM UTC+1, Jochen Schalanda wrote:
>>>
>>> Hi Martin,
>>>
>>> please try deleting the files in your message_cache_spool_dir (see
>>> graylog2.conf).
>>>
>>>
>>> Cheers,
>>> Jochen
>>>
>>> On Tuesday, 2 December 2014 10:16:38 UTC+1, Martin René Mortensen wrote:
>>>>
>>>>  After upgrading to 0.92 Im having troubles with
>>>> java.lang.NullPointerException in GL2 server logs. I have 3 graylog2
>>>> servers all reporting the same errors periodically.
>>>>
>>>> I'm getting these when starting:
>>>>
>>>> 2014-12-01T14:09:33.416+01:00 INFO  [node] [node2] initialized
>>>> 2014-12-01T14:09:33.685+01:00 INFO  [DiskJournalCache] Compacting
>>>> off-heap message cache database files (output-cache)
>>>> 2014-12-01T14:09:36.913+01:00 INFO  [OutputBuffer] Initialized
>>>> OutputBuffer with ring size <8192> and wait strategy 
>>>> <BlockingWaitStrategy>.
>>>> 2014-12-01T14:09:36.982+01:00 INFO  [Main] Graylog2 Server 0.92.0
>>>> (c1fe236) starting up. (JRE: Oracle Corporation 1.7.0_72 on Linux
>>>> 3.10.0-123.9.3.el7.x86_64)
>>>> 2014-12-01T14:09:37.034+01:00 INFO  [PeriodicalsService] Starting 17
>>>> periodicals ...
>>>> 2014-12-01T14:09:37.038+01:00 INFO  [PeriodicalsService] Not starting
>>>> [org.graylog2.periodical.TelemetryReporterThread] periodical. Not
>>>> configured to run on this node.
>>>> 2014-12-01T14:09:37.038+01:00 INFO  [Periodicals] Starting
>>>> [org.graylog2.periodical.StreamThroughputCounterManagerThread]
>>>> periodical in [0s], polling every [1s].
>>>> 2014-12-01T14:09:37.039+01:00 INFO  [Periodicals] Starting
>>>> [org.graylog2.periodical.InputCacheWorkerThread] periodical, running
>>>> forever.
>>>> 2014-12-01T14:09:37.039+01:00 INFO  [PeriodicalsService] Not starting
>>>> [org.graylog2.periodical.IndexerClusterCheckerThread] periodical. Only
>>>> started on graylog2-server master nodes.
>>>> 2014-12-01T14:09:37.039+01:00 INFO  [PeriodicalsService] Not starting
>>>> [org.graylog2.periodical.ClusterHealthCheckThread] periodical. Only
>>>> started on graylog2-server master nodes.
>>>> 2014-12-01T14:09:37.039+01:00 INFO  [PeriodicalsService] Not starting
>>>> [org.graylog2.periodical.ContentPackLoaderPeriodical] periodical. Only
>>>> started on graylog2-server master nodes.
>>>> 2014-12-01T14:09:37.039+01:00 INFO  [PeriodicalsService] Not starting
>>>> [org.graylog2.periodical.AlertScannerThread] periodical. Only started
>>>> on graylog2-server master nodes.
>>>> 2014-12-01T14:09:37.040+01:00 INFO  [Periodicals] Starting
>>>> [org.graylog2.periodical.BatchedElasticSearchOutputFlushThread]
>>>> periodical in [0s], polling every [5s].
>>>> 2014-12-01T14:09:37.040+01:00 INFO  [Periodicals] Starting
>>>> [org.graylog2.periodical.GarbageCollectionWarningThread] periodical,
>>>> running forever.
>>>> 2014-12-01T14:09:37.041+01:00 INFO  [PeriodicalsService] Not starting
>>>> [org.graylog2.periodical.IndexRotationThread] periodical. Only started
>>>> on graylog2-server master nodes.
>>>> 2014-12-01T14:09:37.041+01:00 INFO  [Periodicals] Starting
>>>> [org.graylog2.periodical.ThroughputCounterManagerThread] periodical in
>>>> [0s], polling every [1s].
>>>> 2014-12-01T14:09:37.042+01:00 INFO  [Periodicals] Starting
>>>> [org.graylog2.periodical.MasterCacheWorkerThread] periodical, running
>>>> forever.
>>>> 2014-12-01T14:09:37.043+01:00 INFO  [Periodicals] Starting
>>>> [org.graylog2.periodical.DeadLetterThread] periodical, running forever.
>>>> 2014-12-01T14:09:37.044+01:00 INFO  [PeriodicalsService] Not starting
>>>> [org.graylog2.periodical.VersionCheckThread] periodical. Only started
>>>> on graylog2-server master nodes.
>>>> 2014-12-01T14:09:37.044+01:00 INFO  [PeriodicalsService] Not starting
>>>> [org.graylog2.periodical.IndexRetentionThread] periodical. Only
>>>> started on graylog2-server master nodes.
>>>> 2014-12-01T14:09:37.044+01:00 INFO  [Periodicals] Starting
>>>> [org.graylog2.periodical.OutputCacheWorkerThread] periodical, running
>>>> forever.
>>>> 2014-12-01T14:09:37.044+01:00 INFO  [Periodicals] Starting
>>>> [org.graylog2.periodical.NodePingThread] periodical in [0s], polling
>>>> every [1s].
>>>> 2014-12-01T14:09:37.050+01:00 INFO  [node] [node2] starting ...
>>>> 2014-12-01T14:09:37.270+01:00 INFO  [transport] [node2] bound_address
>>>> {inet[/0:0:0:0:0:0:0:0:9350]}, publish_address {inet[/1.1.1.107:9350]}
>>>> 2014-12-01T14:09:37.279+01:00 ERROR [MasterCacheWorkerThread] Error
>>>> while trying to work on MasterCache <org.graylog2.caches.
>>>> DiskJournalCache.Output>.
>>>> java.lang.NullPointerException
>>>>         at org.mapdb.Queues$SimpleQueue.peek(Queues.java:117)
>>>>         at org.mapdb.Queues$SimpleQueue.isEmpty(Queues.java:287)
>>>>         at org.graylog2.caches.DiskJournalCache.isEmpty(
>>>> DiskJournalCache.java:238)
>>>>         at org.graylog2.periodical.MasterCacheWorkerThread.work(
>>>> MasterCacheWorkerThread.java:102)
>>>>         at org.graylog2.periodical.MasterCacheWorkerThread.access$200(
>>>> MasterCacheWorkerThread.java:43)
>>>>         at org.graylog2.periodical.MasterCacheWorkerThread$2.run(
>>>> MasterCacheWorkerThread.java:87)
>>>>         at java.lang.Thread.run(Thread.java:745)
>>>> 2014-12-01T14:09:37.305+01:00 INFO  [discovery] [node2]
>>>> spocklog/zvu6TQifTVe0eBV_h9NU0A
>>>> 2014-12-01T14:09:38.497+01:00 ERROR [MasterCacheWorkerThread] Error
>>>> while trying to work on MasterCache <org.graylog2.caches.
>>>> DiskJournalCache.Output>.
>>>> java.lang.NullPointerException
>>>>         at org.mapdb.Queues$SimpleQueue.peek(Queues.java:117)
>>>>         at org.mapdb.Queues$SimpleQueue.isEmpty(Queues.java:287)
>>>>         at org.graylog2.caches.DiskJournalCache.isEmpty(
>>>> DiskJournalCache.java:238)
>>>>         at org.graylog2.periodical.MasterCacheWorkerThread.work(
>>>> MasterCacheWorkerThread.java:102)
>>>>         at org.graylog2.periodical.MasterCacheWorkerThread.access$200(
>>>> MasterCacheWorkerThread.java:43)
>>>>         at org.graylog2.periodical.MasterCacheWorkerThread$2.run(
>>>> MasterCacheWorkerThread.java:87)
>>>>         at java.lang.Thread.run(Thread.java:745)
>>>> 2014-12-01T14:09:38.763+01:00 INFO  [KieRepositoryImpl] KieModule was
>>>> added:MemoryKieModule[ ReleaseId=org.graylog2:dynamic-rules:0]
>>>> 2014-12-01T14:09:38.852+01:00 INFO  [KieRepositoryImpl] Adding
>>>> KieModule from resource :[ByteArrayResource resource=[B@5da78d54]
>>>> 2014-12-01T14:09:38.961+01:00 INFO  [KieRepositoryImpl] KieModule was
>>>> added:MemoryKieModule[ ReleaseId=org.graylog2:dynamic-rules:0]
>>>> 2014-12-01T14:09:39.475+01:00 WARN  [BatchedElasticSearchOutput]
>>>> Clearing buffer (5000 messages) because the Elasticsearch cluster is down.
>>>> 2014-12-01T14:09:40.179+01:00 WARN  [BatchedElasticSearchOutput]
>>>> Clearing buffer (5000 messages) because the Elasticsearch cluster is down.
>>>> 2014-12-01T14:09:40.313+01:00 WARN  [discovery] [node2] waited for 3s
>>>> and no initial state was set by the discovery
>>>> 2014-12-01T14:09:40.315+01:00 INFO  [node] [node2] started
>>>>
>>>>  --
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-- 
Tristan Rhodes

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