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https://issues.apache.org/jira/browse/NIFI-5184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16472367#comment-16472367
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Bryan Bende commented on NIFI-5184:
-----------------------------------
Given the limitations of the JDK native library loading and the native
libraries themsevles, there is always going to be some trade-off... if we did
what you are suggesting then we would possible make the native libraries work
better, but would be sacrificing some of the isolation by making additional
native libs/jars visible at a higher level which makes them visible to other
components that don't need/want them.
Also, something to keep in mind is that not only would the native libs need to
be loaded at a higher shared level, but also the Java code that uses them...
One time i did a test where I tried to load the Hadoop native libs into the
system class loader right at the beginning of NiFi start up, but the Java code
was still loaded down in the NAR class loader, and that Java got unsatisfied
link errors because it also needed to be loaded into the system class loader
where the native libs were loaded, which would then mean Hadoop libs would be
on the classpath of every single NAR/component which then defeats the purpose
of NARs.
> Nifi JMS Controller Disable/Enable causes Classloader Issues with Native Libs
> -----------------------------------------------------------------------------
>
> Key: NIFI-5184
> URL: https://issues.apache.org/jira/browse/NIFI-5184
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.5.0
> Reporter: Greg Senia
> Priority: Major
>
> When attempting to use a Local IBM QMGR with MQ Bindings. IBM States that
> within the JDK only one instance of the native library can be loaded. I've
> worked around this issue by symlinking the IBM MQ Libs into nifi/lib/ which
> is not a good solution. Wondering if this is a known issue with Nifi and the
> NAR classloader functions or if this is something that can be fixed so that
> Nifi can correctly work IBM MQ and MQBindings.
>
> This only occurs after you disable and than reenable the controller:
>
> 2018-05-10 21:10:34,865 ERROR [Timer-Driven Process Thread-2]
> o.apache.nifi.jms.processors.ConsumeJMS ConsumeJMS -
> JMSConsumer[destination:null; pub-sub:false;] ConsumeJMS -
> JMSConsumer[destination:null; pub-sub:false;] failed to process session due
> to org.springframework.jms.UncategorizedJmsException: Uncategorized exception
> occured during JMS processing; nested exception is
> com.ibm.msg.client.jms.DetailedJMSException: JMSFMQ6312: An exception
> occurred in the Java(tm) MQI.
> The Java(tm) MQI has thrown an exception describing the problem.
> See the linked exception for further information.; nested exception is
> com.ibm.mq.jmqi.local.LocalMQ$4: CC=2;RC=2495;AMQ8598: Failed to load the
> WebSphere MQ native JNI library: 'mqjbnd'.: {}
> org.springframework.jms.UncategorizedJmsException: Uncategorized exception
> occured during JMS processing; nested exception is
> com.ibm.msg.client.jms.DetailedJMSException: JMSFMQ6312: An exception
> occurred in the Java(tm) MQI.
> The Java(tm) MQI has thrown an exception describing the problem.
> See the linked exception for further information.; nested exception is
> com.ibm.mq.jmqi.local.LocalMQ$4: CC=2;RC=2495;AMQ8598: Failed to load the
> WebSphere MQ native JNI library: 'mqjbnd'.
> at
> org.springframework.jms.support.JmsUtils.convertJmsAccessException(JmsUtils.java:316)
> at
> org.springframework.jms.support.JmsAccessor.convertJmsAccessException(JmsAccessor.java:169)
> at org.springframework.jms.core.JmsTemplate.execute(JmsTemplate.java:497)
> at org.apache.nifi.jms.processors.JMSConsumer.consume(JMSConsumer.java:66)
> at
> org.apache.nifi.jms.processors.ConsumeJMS.rendezvousWithJms(ConsumeJMS.java:156)
> at
> org.apache.nifi.jms.processors.AbstractJMSProcessor.onTrigger(AbstractJMSProcessor.java:147)
> at org.apache.nifi.jms.processors.ConsumeJMS.onTrigger(ConsumeJMS.java:58)
> at
> org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
> at
> org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1122)
> at
> org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:147)
> at
> org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47)
> at
> org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:128)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: com.ibm.msg.client.jms.DetailedJMSException: JMSFMQ6312: An
> exception occurred in the Java(tm) MQI.
> at sun.reflect.GeneratedConstructorAccessor192.newInstance(Unknown Source)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
> at
> com.ibm.msg.client.commonservices.j2se.NLSServices.createException(NLSServices.java:319)
> at
> com.ibm.msg.client.commonservices.nls.NLSServices.createException(NLSServices.java:226)
> at
> com.ibm.msg.client.wmq.factories.WMQConnectionFactory.createV7ProviderConnection(WMQConnectionFactory.java:8445)
> at
> com.ibm.msg.client.wmq.factories.WMQConnectionFactory.createProviderConnection(WMQConnectionFactory.java:7814)
> at
> com.ibm.msg.client.jms.admin.JmsConnectionFactoryImpl._createConnection(JmsConnectionFactoryImpl.java:299)
> at
> com.ibm.msg.client.jms.admin.JmsConnectionFactoryImpl.createConnection(JmsConnectionFactoryImpl.java:236)
> at
> com.ibm.mq.jms.MQConnectionFactory.createCommonConnection(MQConnectionFactory.java:6024)
> at
> com.ibm.mq.jms.MQConnectionFactory.createConnection(MQConnectionFactory.java:6049)
> at
> org.springframework.jms.connection.UserCredentialsConnectionFactoryAdapter.doCreateConnection(UserCredentialsConnectionFactoryAdapter.java:181)
> at
> org.springframework.jms.connection.UserCredentialsConnectionFactoryAdapter.createConnection(UserCredentialsConnectionFactoryAdapter.java:152)
> at
> org.springframework.jms.connection.SingleConnectionFactory.doCreateConnection(SingleConnectionFactory.java:365)
> at
> org.springframework.jms.connection.SingleConnectionFactory.initConnection(SingleConnectionFactory.java:305)
> at
> org.springframework.jms.connection.SingleConnectionFactory.getConnection(SingleConnectionFactory.java:283)
> at
> org.springframework.jms.connection.SingleConnectionFactory.createConnection(SingleConnectionFactory.java:224)
> at
> org.springframework.jms.support.JmsAccessor.createConnection(JmsAccessor.java:180)
> at org.springframework.jms.core.JmsTemplate.execute(JmsTemplate.java:484)
> ... 16 common frames omitted
> Caused by: com.ibm.mq.jmqi.local.LocalMQ$4: CC=2;RC=2495;AMQ8598: Failed to
> load the WebSphere MQ native JNI library: 'mqjbnd'.
> at com.ibm.mq.jmqi.local.LocalMQ.loadLib(LocalMQ.java:1268)
> at com.ibm.mq.jmqi.local.LocalMQ$1.run(LocalMQ.java:309)
> at java.security.AccessController.doPrivileged(Native Method)
> at com.ibm.mq.jmqi.local.LocalMQ.initialise_inner(LocalMQ.java:259)
> at com.ibm.mq.jmqi.local.LocalMQ.initialise(LocalMQ.java:221)
> at com.ibm.mq.jmqi.local.LocalMQ.<init>(LocalMQ.java:1350)
> at com.ibm.mq.jmqi.local.LocalServer.<init>(LocalServer.java:230)
> at sun.reflect.GeneratedConstructorAccessor191.newInstance(Unknown Source)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
> at com.ibm.mq.jmqi.JmqiEnvironment.getInstance(JmqiEnvironment.java:706)
> at com.ibm.mq.jmqi.JmqiEnvironment.getMQI(JmqiEnvironment.java:640)
> at
> com.ibm.msg.client.wmq.factories.WMQConnectionFactory.createV7ProviderConnection(WMQConnectionFactory.java:8437)
> ... 29 common frames omitted
> Caused by: java.lang.UnsatisfiedLinkError: Native Library
> /opt/mqm/java/lib64/libmqjbnd.so already loaded in another classloader
> at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1907)
> at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1824)
> at java.lang.Runtime.load0(Runtime.java:809)
> at java.lang.System.load(System.java:1086)
> at com.ibm.mq.jmqi.local.LocalMQ.loadLib(LocalMQ.java:1228)
> ... 41 common frames omitted
>
>
>
> I've worked around this by doing the following:
> -rw-r-----. 1 nifi nifi 8073242 Jan 30 18:23 nifi-livy-nar-1.5.0.nar
> -rw-r-----. 1 nifi nifi 65753907 Jan 30 18:23 nifi-atlas-nar-1.5.0.nar
> drwxr-xr-x. 7 nifi nifi 140 May 9 21:43 ..
> drwxr-xr-x. 2 nifi nifi 4096 May 10 22:18 bootstrap
> lrwxrwxrwx. 1 nifi nifi 42 May 10 22:25 com.ibm.mq.allclient.jar ->
> /opt/mqm/java/lib/com.ibm.mq.allclient.jar
> lrwxrwxrwx. 1 nifi nifi 38 May 10 22:25 com.ibm.mq.axis2.jar ->
> /opt/mqm/java/lib/com.ibm.mq.axis2.jar
> lrwxrwxrwx. 1 nifi nifi 40 May 10 22:25 com.ibm.mq.headers.jar ->
> /opt/mqm/java/lib/com.ibm.mq.headers.jar
> lrwxrwxrwx. 1 nifi nifi 32 May 10 22:25 com.ibm.mq.jar ->
> /opt/mqm/java/lib/com.ibm.mq.jar
> lrwxrwxrwx. 1 nifi nifi 37 May 10 22:25 com.ibm.mq.jmqi.jar ->
> /opt/mqm/java/lib/com.ibm.mq.jmqi.jar
> lrwxrwxrwx. 1 nifi nifi 35 May 10 22:25 com.ibm.mqjms.jar ->
> /opt/mqm/java/lib/com.ibm.mqjms.jar
> lrwxrwxrwx. 1 nifi nifi 43 May 10 22:25 com.ibm.mq.jms.Nojndi.jar ->
> /opt/mqm/java/lib/com.ibm.mq.jms.Nojndi.jar
> lrwxrwxrwx. 1 nifi nifi 36 May 10 22:25 com.ibm.mq.pcf.jar ->
> /opt/mqm/java/lib/com.ibm.mq.pcf.jar
> lrwxrwxrwx. 1 nifi nifi 37 May 10 22:25 com.ibm.mq.soap.jar ->
> /opt/mqm/java/lib/com.ibm.mq.soap.jar
> lrwxrwxrwx. 1 nifi nifi 45 May 10 22:25 com.ibm.mq.traceControl.jar ->
> /opt/mqm/java/lib/com.ibm.mq.traceControl.jar
> lrwxrwxrwx. 1 nifi nifi 31 May 10 22:25 fscontext.jar ->
> /opt/mqm/java/lib/fscontext.jar
> lrwxrwxrwx. 1 nifi nifi 25 May 10 22:25 jms.jar ->
> /opt/mqm/java/lib/jms.jar
> lrwxrwxrwx. 1 nifi nifi 34 May 10 22:25 providerutil.jar ->
> /opt/mqm/java/lib/providerutil.jar
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