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From ashish singhi <ashish.sin...@huawei.com>
Subject Master shuts down during log splitting on restart
Date Thu, 25 Sep 2014 05:36:09 GMT
Hi All.

I am using 0.98.6 HBase.

I observed that when I have the following value set in my hbase-site.xml file

<property>
<name>hbase.regionserver.wal.encryption</name>
<value>false</value>
</property>
<property>
<name>hbase.regionserver.hlog.reader.impl</name>
<value>org.apache.hadoop.hbase.regionserver.wal.SecureProtobufLogReader</value>
</property>
<property>
<name>hbase.regionserver.hlog.writer.impl</name>
<value>org.apache.hadoop.hbase.regionserver.wal.SecureProtobufLogWriter</value>
</property>

And while log splitting on hbase service restart, master shutdown with following exception.

Exception in master log

2014-09-24 17:14:28,590 FATAL [master:host-10-18-40-18:60000] master.HMaster: Master server
abort: loaded coprocessors are: [org.apache.hadoop.hbase.security.access.AccessController]
2014-09-24 17:14:28,590 FATAL [master:host-10-18-40-18:60000] master.HMaster: Unhandled exception.
Starting shutdown.
java.io.IOException: error or interrupted while splitting logs in [hdfs://10.18.40.18:8020/tmp/hbase-ashish/hbase/WALs/host-10-18-40-18,60020,1411558717849-splitting]
Task = installed = 6 done = 0 error = 6
                at org.apache.hadoop.hbase.master.SplitLogManager.splitLogDistributed(SplitLogManager.java:378)
                at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:415)
                at org.apache.hadoop.hbase.master.MasterFileSystem.splitMetaLog(MasterFileSystem.java:307)
                at org.apache.hadoop.hbase.master.MasterFileSystem.splitMetaLog(MasterFileSystem.java:298)
                at org.apache.hadoop.hbase.master.HMaster.splitMetaLogBeforeAssignment(HMaster.java:1071)
                at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:863)
                at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:612)
                at java.lang.Thread.run(Thread.java:745)

Exception in region server log

2014-09-24 20:10:16,535 WARN  [RS_LOG_REPLAY_OPS-host-10-18-40-18:60020-1] regionserver.SplitLogWorker:
log splitting of WALs/host-10-18-40-18,60020,1411558717849-splitting/host-10-18-40-18%2C60020%2C1411558717849.1411558724316.meta
failed, returning error
java.io.IOException: Cannot get log reader
                at org.apache.hadoop.hbase.regionserver.wal.HLogFactory.createReader(HLogFactory.java:161)
                at org.apache.hadoop.hbase.regionserver.wal.HLogFactory.createReader(HLogFactory.java:89)
                at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.getReader(HLogSplitter.java:660)
                at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.getReader(HLogSplitter.java:569)
                at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.splitLogFile(HLogSplitter.java:282)
                at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.splitLogFile(HLogSplitter.java:225)
                at org.apache.hadoop.hbase.regionserver.SplitLogWorker$1.exec(SplitLogWorker.java:143)
                at org.apache.hadoop.hbase.regionserver.handler.HLogSplitterHandler.process(HLogSplitterHandler.java:82)
                at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:128)
                at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
                at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
                at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.UnsupportedOperationException: Unable to find suitable constructor for
class org.apache.hadoop.hbase.regionserver.wal.SecureWALCellCodec
                at org.apache.hadoop.hbase.util.ReflectionUtils.instantiateWithCustomCtor(ReflectionUtils.java:39)
                at org.apache.hadoop.hbase.regionserver.wal.WALCellCodec.create(WALCellCodec.java:101)
                at org.apache.hadoop.hbase.regionserver.wal.ProtobufLogReader.getCodec(ProtobufLogReader.java:242)
                at org.apache.hadoop.hbase.regionserver.wal.ProtobufLogReader.initAfterCompression(ProtobufLogReader.java:247)
                at org.apache.hadoop.hbase.regionserver.wal.SecureProtobufLogReader.initAfterCompression(SecureProtobufLogReader.java:138)
                at org.apache.hadoop.hbase.regionserver.wal.ReaderBase.init(ReaderBase.java:85)
                at org.apache.hadoop.hbase.regionserver.wal.HLogFactory.createReader(HLogFactory.java:113)
                ... 11 more
Caused by: java.lang.NoSuchMethodException: org.apache.hadoop.hbase.regionserver.wal.SecureWALCellCodec.<init>(org.apache.hadoop.conf.Configuration,
org.apache.hadoop.hbase.regionserver.wal.CompressionContext)
                at java.lang.Class.getConstructor0(Class.java:2849)
                at java.lang.Class.getDeclaredConstructor(Class.java:2053)
                at org.apache.hadoop.hbase.util.ReflectionUtils.instantiateWithCustomCtor(ReflectionUtils.java:33)
                ... 17 more

Question,

When wal encryption is disabled should we set SecureWALCellCodec for cellCodecClsName in WALHeader.Builder
object  ?



Regards,
Ashish Singhi

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