Shen Yinjie created HDFS-14245:
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Summary: Class cast error in GetGroups with
ObserverReadProxyProvider
Key: HDFS-14245
URL: https://issues.apache.org/jira/browse/HDFS-14245
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Shen Yinjie
Run "hdfs groups" with ObserverReadProxyProvider, Exception throws as :
{code:java}
Exception in thread "main" java.io.IOException: Couldn't create proxy provider
class org.apache.hadoop.hdfs.server.namenode.ha.ObserverReadProxyProvider
at
org.apache.hadoop.hdfs.NameNodeProxiesClient.createFailoverProxyProvider(NameNodeProxiesClient.java:261)
at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:119)
at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:95)
at org.apache.hadoop.hdfs.tools.GetGroups.getUgmProtocol(GetGroups.java:87)
at org.apache.hadoop.tools.GetGroupsBase.run(GetGroupsBase.java:71)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:90)
at org.apache.hadoop.hdfs.tools.GetGroups.main(GetGroups.java:96)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at
org.apache.hadoop.hdfs.NameNodeProxiesClient.createFailoverProxyProvider(NameNodeProxiesClient.java:245)
... 7 more
Caused by: java.lang.ClassCastException:
org.apache.hadoop.hdfs.server.namenode.ha.NameNodeHAProxyFactory cannot be cast
to org.apache.hadoop.hdfs.server.namenode.ha.ClientHAProxyFactory
at
org.apache.hadoop.hdfs.server.namenode.ha.ObserverReadProxyProvider.<init>(ObserverReadProxyProvider.java:123)
at
org.apache.hadoop.hdfs.server.namenode.ha.ObserverReadProxyProvider.<init>(ObserverReadProxyProvider.java:112)
... 12 more
{code}
similar with HDFS-14116, we did a simple fix.
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