Nikita Pande created HBASE-27991:
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Summary: [hbase-examples] MultiThreadedClientExample throws
java.lang.ClassCastException
Key: HBASE-27991
URL: https://issues.apache.org/jira/browse/HBASE-27991
Project: HBase
Issue Type: Bug
Reporter: Nikita Pande
Tried using run() method call of
[https://github.com/apache/hbase/blob/master/hbase-examples/src/main/java/org/apache/hadoop/hbase/client/example/MultiThreadedClientExample.java|https://github.com/apache/hbase/blob/master/hbase-examples/src/main/java/org/apache/hadoop/hbase/client/example/MultiThreadedClientExample.java.]
Following the stack trace of error during runtime
{code:java}
Exception in thread "main" java.io.IOException:
java.lang.reflect.UndeclaredThrowableException
at
org.apache.hadoop.hbase.client.ConnectionFactory.lambda$createConnection$1(ConnectionFactory.java:235)
at org.apache.hadoop.hbase.trace.TraceUtil.trace(TraceUtil.java:216)
at
org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java:218)
at
org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java:160)
at
org.apache.hadoop.hbase.client.example.MultiThreadedClientExample.run(MultiThreadedClientExample.java:136)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:90)
at <classname>.runMultiThreadedRWOps(xxxxxx)
at <classname>.main(xxxxxx)
Caused by: java.lang.reflect.UndeclaredThrowableException
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1780)
at
org.apache.hadoop.hbase.security.User$SecureHadoopUser.runAs(User.java:328)
at
org.apache.hadoop.hbase.client.ConnectionFactory.lambda$createConnection$1(ConnectionFactory.java:232)
... 8 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedConstructorAccessor16.newInstance(Unknown Source)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at
org.apache.hadoop.hbase.client.ConnectionFactory.lambda$null$0(ConnectionFactory.java:233)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1762)
... 10 more
Caused by: java.lang.ClassCastException: java.util.concurrent.ForkJoinPool
cannot be cast to java.util.concurrent.ThreadPoolExecutor
at
org.apache.hadoop.hbase.client.ConnectionImplementation.<init>(ConnectionImplementation.java:283)
at
org.apache.hadoop.hbase.client.ConnectionImplementation.<init>(ConnectionImplementation.java:270)
... 17 more{code}
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