java.lang.reflect.UndeclaredThrowableException: This exception has no message.

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This was a bug at HBase 1.0.1, it has been patched, so an update to 1.0.2 or further should solve the problem. URL for the Jira thread:

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via GitHub by ryan-williams
, 2 years ago
This exception has no message.
via spark-user by nitinkak001, 1 year ago
This exception has no message.
via spark-user by Otis Gospodnetic, 1 year ago
via spark-user by, 1 year ago Connection refused: /XX.XX.XX.XX:7878
at Method)
at io.netty.util.concurrent.SingleThreadEventExecutor$

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