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https://issues.apache.org/jira/browse/NIFI-3377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16291508#comment-16291508
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ASF GitHub Bot commented on NIFI-3377:
--------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/nifi/pull/2340
> NiFi RPG errors when switching between site-to-site transport protocols
> -----------------------------------------------------------------------
>
> Key: NIFI-3377
> URL: https://issues.apache.org/jira/browse/NIFI-3377
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.1.0
> Reporter: Matthew Clarke
> Assignee: Koji Kawamura
> Priority: Minor
> Fix For: 1.5.0
>
>
> If i have a RPG configured to use the RAW transport protocol and then switch
> it to use HTTTP transport protocol, it will throw the following error message
> twice before finally correcting itself:
> 2017-01-19 22:10:32,363 ERROR [I/O dispatcher 841]
> o.a.n.r.util.SiteToSiteRestApiClient Failed to create transaction for
> http://<hostname>.openstacklocal:8055/nifi-api/data-transfer/input-ports/b76c293d-0159-1000-0000-00003f85f297/transactions
> org.apache.http.ConnectionClosedException: Connection closed unexpectedly
> at
> org.apache.http.nio.protocol.HttpAsyncRequestExecutor.closed(HttpAsyncRequestExecutor.java:140)
> [httpcore-nio-4.4.5.jar:4.4.5]
> at
> org.apache.http.impl.nio.client.InternalIODispatch.onClosed(InternalIODispatch.java:71)
> [httpasyncclient-4.1.2.jar:4.1.2]
> at
> org.apache.http.impl.nio.client.InternalIODispatch.onClosed(InternalIODispatch.java:39)
> [httpasyncclient-4.1.2.jar:4.1.2]
> at
> org.apache.http.impl.nio.reactor.AbstractIODispatch.disconnected(AbstractIODispatch.java:100)
> [httpcore-nio-4.4.5.jar:4.4.5]
> at
> org.apache.http.impl.nio.reactor.BaseIOReactor.sessionClosed(BaseIOReactor.java:279)
> [httpcore-nio-4.4.5.jar:4.4.5]
> at
> org.apache.http.impl.nio.reactor.AbstractIOReactor.processClosedSessions(AbstractIOReactor.java:440)
> [httpcore-nio-4.4.5.jar:4.4.5]
> at
> org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:283)
> [httpcore-nio-4.4.5.jar:4.4.5]
> at
> org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
> [httpcore-nio-4.4.5.jar:4.4.5]
> at
> org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:588)
> [httpcore-nio-4.4.5.jar:4.4.5]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_77]
> Similarly the following ERROR message will be thrown many times when
> switching from HTTP to the RAW transport protocol:
> 2017-01-19 22:13:15,916 ERROR [Timer-Driven Process Thread-10]
> o.a.nifi.remote.StandardRemoteGroupPort
> RemoteGroupPort[name=outport2,targets=http://<hostname>:9090/nifi/] failed to
> communicate with http://<hostname>:9090/nifi/ due to
> org.apache.nifi.remote.exception.HandshakeException:
> org.apache.nifi.remote.exception.ProtocolException: Expected to receive
> ResponseCode, but the stream did not have a ResponseCode
> With both these scenarios, the RPG will eventually correct itself and start
> working again. User may be hesitant to wait once they start seeing these
> ERRORS and instead stop the RPG since the self correction does not occur
> rapidly.
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