Release Notes
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Known Issues

Summary of known issues for this release.

Hortonworks Bug ID Apache JIRA Apache Component Summary
N/A N/A NiFi

JDK 8u242 and newer versions cause Site-to-Site failure

When you use JDK 8u242 or a newer version, the RAW transport protocol in Site-to-Site fails with the following exception:
2018-12-19 16:19:26,811 ERROR [Site-to-Site Listener] org.apache.nifi.NiFi
 java.nio.channels.IllegalBlockingModeException: null
 at java.base/
 at org.apache.nifi.remote.SocketRemoteSiteListener$
 at java.base/
Workarounds: Choose one of the following options before upgrading to JDK 8u242 or a newer JDK version:
  • Upgrade to HDF 3.5.1 or a newer version. Cloudera recommends this option.
  • Change all the Remote Process Groups and Site-to-Site based reporting tasks to use HTTP transport protocol instead of RAW transport protocol.

If neither of these options work for you, contact Cloudera Support for other options.

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