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https://issues.apache.org/jira/browse/HBASE-6295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13635225#comment-13635225
]
Nicolas Liochon commented on HBASE-6295:
----------------------------------------
Load test with YCSB on EC2. Lot of problems. The server seems sensible to the
workload, and beeing asynchronous adds some workload.
Here is a stack with a moderate setting. I don't get the "UnknownHostException:
ip-10-4-226-168", may be there are much calls for AWS...
{noformat}
2013-04-18 10:41:33,377 INFO
[regionserver60020-smallCompactions-1366296026287]
org.apache.hadoop.hbase.regionserver.StoreFile: Delete Family Bloom f
2013-04-18 10:41:37,849 FATAL [regionserver60020.logRoller]
org.apache.hadoop.hbase.regionserver.HRegionServer: ABORTING region server
ip-10-4-229-217
java.io.IOException: cannot get log writer
at
org.apache.hadoop.hbase.regionserver.wal.HLogFactory.createWriter(HLogFactory.java:162)
at
org.apache.hadoop.hbase.regionserver.wal.FSHLog.createWriterInstance(FSHLog.java:591)
at
org.apache.hadoop.hbase.regionserver.wal.FSHLog.rollWriter(FSHLog.java:533)
at org.apache.hadoop.hbase.regionserver.LogRoller.run(LogRoller.java:96)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.io.IOException: java.lang.RuntimeException:
java.lang.reflect.InvocationTargetException
at
org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter.init(SequenceFileLogWriter.java:169)
at
org.apache.hadoop.hbase.regionserver.wal.HLogFactory.createWriter(HLogFactory.java:159)
... 4 more
Caused by: java.lang.RuntimeException:
java.lang.reflect.InvocationTargetException
at
org.apache.hadoop.fs.AbstractFileSystem.newInstance(AbstractFileSystem.java:123)
at
org.apache.hadoop.fs.AbstractFileSystem.createFileSystem(AbstractFileSystem.java:149)
at
org.apache.hadoop.fs.AbstractFileSystem.get(AbstractFileSystem.java:234)
at org.apache.hadoop.fs.FileContext$2.run(FileContext.java:342)
at org.apache.hadoop.fs.FileContext$2.run(FileContext.java:339)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1441)
at
org.apache.hadoop.fs.FileContext.getAbstractFileSystem(FileContext.java:339)
at org.apache.hadoop.fs.FileContext.getFileContext(FileContext.java:453)
at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:469)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter.init(SequenceFileLogWriter.java:150)
... 5 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at
org.apache.hadoop.fs.AbstractFileSystem.newInstance(AbstractFileSystem.java:121)
... 20 more
Caused by: java.lang.IllegalArgumentException: java.net.UnknownHostException:
ip-10-4-226-168
at
org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:417)
at
org.apache.hadoop.hdfs.NameNodeProxies.createNonHAProxy(NameNodeProxies.java:164)
at
org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:129)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:415)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:382)
at org.apache.hadoop.fs.Hdfs.<init>(Hdfs.java:85)
... 25 more
Caused by: java.net.UnknownHostException: ip-10-4-226-168
... 31 more
2013-04-18 10:41:37,851 FATAL [regionserver60020.logRoller]
org.apache.hadoop.hbase.regionserver.HRegionServer: RegionServer abort: loaded
coprocessor
2013-04-18 10:41:37,863 INFO [regionserver60020.logRoller]
org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: IOE in log roller
{noformat}
> Possible performance improvement in client batch operations: presplit and
> send in background
> --------------------------------------------------------------------------------------------
>
> Key: HBASE-6295
> URL: https://issues.apache.org/jira/browse/HBASE-6295
> Project: HBase
> Issue Type: Improvement
> Components: Client, Performance
> Affects Versions: 0.95.2
> Reporter: Nicolas Liochon
> Assignee: Nicolas Liochon
> Labels: noob
> Attachments: 6295.v1.patch, 6295.v2.patch, 6295.v3.patch
>
>
> today batch algo is:
> {noformat}
> for Operation o: List<Op>{
> add o to todolist
> if todolist > maxsize or o last in list
> split todolist per location
> send split lists to region servers
> clear todolist
> wait
> }
> {noformat}
> We could:
> - create immediately the final object instead of an intermediate array
> - split per location immediately
> - instead of sending when the list as a whole is full, send it when there is
> enough data for a single location
> It would be:
> {noformat}
> for Operation o: List<Op>{
> get location
> add o to todo location.todolist
> if (location.todolist > maxLocationSize)
> send location.todolist to region server
> clear location.todolist
> // don't wait, continue the loop
> }
> send remaining
> wait
> {noformat}
> It's not trivial to write if you add error management: retried list must be
> shared with the operations added in the todolist. But it's doable.
> It's interesting mainly for 'big' writes
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