Henry Hung created HDFS-5566:
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Summary: HA namenode with QJM created from
org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider
should implement Closeable
Key: HDFS-5566
URL: https://issues.apache.org/jira/browse/HDFS-5566
Project: Hadoop HDFS
Issue Type: Bug
Environment: hadoop-2.2.0
hbase-0.96
Reporter: Henry Hung
When using hbase-0.96 with hadoop-2.2.0, stopping master/regionserver node will
result in {{Cannot close proxy - is not Closeable or does not provide closeable
invocation}}.
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My hadoop-2.2.0 configured as HA namenode with QJM, the configuration is like
this:
{code:xml}
<property>
<name>dfs.nameservices</name>
<value>hadoopdev</value>
</property>
<property>
<name>dfs.ha.namenodes.hadoopdev</name>
<value>nn1,nn2</value>
</property>
<property>
<name>dfs.namenode.rpc-address.hadoopdev.nn1</name>
<value>fphd9.ctpilot1.com:9000</value>
</property>
<property>
<name>dfs.namenode.http-address.hadoopdev.nn1</name>
<value>fphd9.ctpilot1.com:50070</value>
</property>
<property>
<name>dfs.namenode.rpc-address.hadoopdev.nn2</name>
<value>fphd10.ctpilot1.com:9000</value>
</property>
<property>
<name>dfs.namenode.http-address.hadoopdev.nn2</name>
<value>fphd10.ctpilot1.com:50070</value>
</property>
<property>
<name>dfs.namenode.shared.edits.dir</name>
<value>qjournal://fphd8.ctpilot1.com:8485;fphd9.ctpilot1.com:8485;fphd10.ctpilot1.com:8485/hadoopdev</value>
</property>
<property>
<name>dfs.client.failover.proxy.provider.hadoopdev</name>
<value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
</property>
<property>
<name>dfs.ha.fencing.methods</name>
<value>shell(/bin/true)</value>
</property>
<property>
<name>dfs.journalnode.edits.dir</name>
<value>/data/hadoop/hadoop-data-2/journal</value>
</property>
<property>
<name>dfs.ha.automatic-failover.enabled</name>
<value>true</value>
</property>
<property>
<name>ha.zookeeper.quorum</name>
<value>fphd1.ctpilot1.com:2222</value>
</property>
{code}
I traced the code and found out that when stopping the hbase master node, it
will try invoke method "close" on namenode, but the instance that created from
{{org.apache.hadoop.hdfs.NameNodeProxies.createProxy}} with
failoverProxyProviderClass
{{org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider}}
do not have the Closeable interface.
If we use the Non-HA case, the created instance will be
{{org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB}} that
implement Closeable.
TL;DR;
With hbase connecting to hadoop HA namenode, when stopping the hbase master or
regionserver, it couldn't find the {{close}} method to gracefully close
namenode session.
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