NPE when trying to roll logs
----------------------------
Key: HBASE-3239
URL: https://issues.apache.org/jira/browse/HBASE-3239
Project: HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.90.0
Reporter: Prakash Khemani
Note from Kannan
findMemstoresWithEditsEqualOrOlderThan() can return NULL it seems like. And we
don't check NULL, before "region.length".
regions =
findMemstoresWithEditsEqualOrOlderThan(this.outputfiles.firstKey(),
this.lastSeqWritten);
StringBuilder sb = new StringBuilder();
for (int i = 0; i < regions.length; i++) {
===
Stack Trace
2010-11-15 19:19:54,258 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache:
LRU Stats: total=6.1 GB, free=1.71 GB, max=7.81 GB, blocks=385740,
accesses=7020255, hits=6329399, hitRatio=90.15%%, cachingAccesses=6765050,
cachingHits=6329399, cachingHitsRatio=93.56%%, evictions=1, evicted=49911,
evictedPerRun=49911.0
2010-11-15 19:21:05,204 INFO
org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter: Using syncFs --
HDFS-200
2010-11-15 19:21:05,211 INFO org.apache.hadoop.hbase.regionserver.wal.HLog:
Roll
/PUMAHBASE001-SNC5-HBASE/.logs/pumahbase042.snc5.facebook.com,60020,1289856892583/10.38.28.57%3A60020.1289877154987,
entries=649004, filesize=255069060. New hlog
/PUMAHBASE001-SNC5-HBASE/.logs/pumahbase042.snc5.facebook.com,60020,1289856892583/10.38.28.57%3A60020.1289877665062
2010-11-15 19:21:05,222 ERROR org.apache.hadoop.hbase.regionserver.LogRoller:
Log rolling failed
java.lang.NullPointerException
at
org.apache.hadoop.hbase.regionserver.wal.HLog.cleanOldLogs(HLog.java:648)
at
org.apache.hadoop.hbase.regionserver.wal.HLog.rollWriter(HLog.java:528)
at org.apache.hadoop.hbase.regionserver.LogRoller.run(LogRoller.java:94)
2010-11-15 19:21:05,226 FATAL
org.apache.hadoop.hbase.regionserver.HRegionServer: ABORTING region server
serverName=pumahbase042.snc5.facebook.com,60020,1289856892583,
load=(requests=3476, regions=40, usedHeap=8388, maxHeap=15987): Log rolling
failed
java.lang.NullPointerException
at
org.apache.hadoop.hbase.regionserver.wal.HLog.cleanOldLogs(HLog.java:648)
at
org.apache.hadoop.hbase.regionserver.wal.HLog.rollWriter(HLog.java:528)
at org.apache.hadoop.hbase.regionserver.LogRoller.run(LogRoller.java:94)
2010-11-15 19:21:05,227 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: Dump of metrics:
request=1264.5834, regions=40, stores=70, storefiles=98, storefileIndexSize=35,
memstoreSize=83, compactionQueueSize=0, usedHeap=8370, maxHeap=15987,
blockCacheSize=6593768536, blockCacheFree=1788154792, blockCacheCount=388283,
blockCacheHitRatio=90, blockCacheHitCachingRatio=93
2010-11-15 19:21:05,227 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: Log rolling failed
2010-11-15 19:21:05,227 INFO org.apache.hadoop.hbase.regionserver.LogRoller:
LogRoller exiting.
2010-11-15 19:21:07,255 INFO org.apache.hadoop.ipc.HBaseServer: Stopping server
on 60020
===
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