If HRegionPartitioner is used in MapReduce, client side configurations are
overwritten by hbase-site.xml.
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Key: HBASE-4398
URL: https://issues.apache.org/jira/browse/HBASE-4398
Project: HBase
Issue Type: Bug
Components: mapreduce
Affects Versions: 0.90.4
Reporter: Takuya Ueshin
If HRegionPartitioner is used in MapReduce, client side configurations are
overwritten by hbase-site.xml.
We can reproduce the problem by the following instructions:
{noformat}
- Add HRegionPartitioner.class to the 4th argument of
TableMapReduceUtil#initTableReducerJob()
at line around 133
in src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableMapReduce.java
- Change or remove "hbase.zookeeper.property.clientPort" property
in hbase-site.xml ( for example, changed to 12345 ).
- run testMultiRegionTable()
{noformat}
Then I got error messages as following:
{noformat}
2011-09-12 22:28:51,020 DEBUG [Thread-832] zookeeper.ZKUtil(93): hconnection
opening connection to ZooKeeper with ensemble (localhost:12345)
2011-09-12 22:28:51,022 INFO [Thread-832] zookeeper.RecoverableZooKeeper(89):
The identifier of this process is [email protected]
2011-09-12 22:28:51,123 WARN [Thread-832] zookeeper.RecoverableZooKeeper(161):
Possibly transient ZooKeeper exception:
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode =
ConnectionLoss for /hbase/master
2011-09-12 22:28:51,123 INFO [Thread-832] zookeeper.RecoverableZooKeeper(173):
The 1 times to retry ZooKeeper after sleeping 1000 ms
=====
2011-09-12 22:29:02,418 ERROR [Thread-832] mapreduce.HRegionPartitioner(125):
java.io.IOException:
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@2e54e48d
closed
2011-09-12 22:29:02,422 WARN [Thread-832] mapred.LocalJobRunner$Job(256):
job_local_0001
java.lang.NullPointerException
at
org.apache.hadoop.hbase.mapreduce.HRegionPartitioner.setConf(HRegionPartitioner.java:128)
at
org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:62)
at
org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
at
org.apache.hadoop.mapred.MapTask$NewOutputCollector.<init>(MapTask.java:527)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:613)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:177)
{noformat}
I think HTable should connect to ZooKeeper at port 21818 configured at client
side instead of 12345 in hbase-site.xml
and It might be caused by "HBaseConfiguration.addHbaseResources(conf);" in
HRegionPartitioner#setConf(Configuration).
And this might mean that all of client side configurations, also configured in
hbase-site.xml, are overwritten caused by this problem.
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