NullPointer and ConcurrentModification Exceptions involving consumerTemplate

Solution In Progress - Updated -

Issue

Noticing these errors randomly in the application when cconsumerTemplate.stop() or ServiceUtil.stopQuietly(consumerTemplate) calls are made (in the methods in the stracktrace, findFile and streamFile)

03:55:13,988 DEBUG [org.apache.camel.util.ServiceHelper] (Camel (camel-2) thread #46 - JmsConsumer[service.routing.jms.broker.dest.process.job]) Caught exception shutting down service: PollingConsumer on Endpoint[ftp://ftpproxy.XXXX.org:21//outbound/fullcxf/asc/aNAstdbk01/bkco_afntind1?binary=true&consumer.bridgeErrorHandler=true&disconnect=true&download=false&ftpClient.bufferSize=1024000&ftpClient.receiveBufferSize=1024000&ftpClient.sendBufferSize=1024000&idempotent=true&idempotentKey=396348-%24%7Bfile%3Aname%7D-%24%7Bfile%3Amodified%7D&idempotentRepository=%23fileStore&inProgressRepository=%23simpleInProgressRepository&include=f_bkco_afntind1%5C.1%5C.asc%5C.zip&maximumReconnectAttempts=0&passiveMode=false&password=xxxxxx&sortBy=reverse%3Afile%3Amodified&stepwise=false&throwExceptionOnConnectFailed=true&timeout=10000&username=XXXX%40ftp.spcompustat.com]: java.lang.NullPointerException
    at org.apache.commons.net.ftp.FTP.__send(FTP.java:505) [commons-net-3.3.jar:3.3]
    at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:479) [commons-net-3.3.jar:3.3]
    at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:608) [commons-net-3.3.jar:3.3]
    at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:582) [commons-net-3.3.jar:3.3]
    at org.apache.commons.net.ftp.FTP.quit(FTP.java:864) [commons-net-3.3.jar:3.3]
    at org.apache.commons.net.ftp.FTPClient.logout(FTPClient.java:1109) [commons-net-3.3.jar:3.3]
    at org.apache.camel.component.file.remote.FtpOperations.disconnect(FtpOperations.java:201) [camel-ftp-2.12.0.redhat-610379.jar:2.12.0.redhat-610379]
    at org.apache.camel.component.file.remote.RemoteFileConsumer.disconnect(RemoteFileConsumer.java:123) [camel-ftp-2.12.0.redhat-610379.jar:2.12.0.redhat-610379]
    at org.apache.camel.component.file.remote.RemoteFileConsumer.doStop(RemoteFileConsumer.java:110) [camel-ftp-2.12.0.redhat-610379.jar:2.12.0.redhat-610379]
    at org.apache.camel.support.ServiceSupport.stop(ServiceSupport.java:102) [camel-core-2.12.0.redhat-610379.jar:2.12.0.redhat-610379]

our endpoint configuration looks like this:

String baseUri = String.format("%s://%s:%s/%s?throwExceptionOnConnectFailed=true"
                + "&binary=%s&consumer.bridgeErrorHandler=true"
                + "&inProgressRepository=#simpleInProgressRepository&maximumReconnectAttempts=0&disconnect=true&stepwise=false&username=%s",
                uriPrefix, endpoint.getServer(), endpoint.getPort(), searchPath, binary, endpoint.getUsername());

Environment

  • Red Hat JBoss Enterprise Application Platform 6.2.0
  • JBoss Fuse 6.x

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