问题
We have an application that was fully working in staging but when we deploy it on production we are getting MQ error 2495. We are running the application in a Tomcat 8.5 and we are using the same MQ libraries (8.0.0.6). The server OS is Windows.
The code for reading the message from the MQ looks like:
MQEnvironment.hostname = queueSettings.getServer();
MQEnvironment.channel = queueSettings.getChannel();
MQEnvironment.port = queueSettings.getPort();
MQQueueManager queueManager = new MQQueueManager(queueSettings.getQueueManager());
int openOptions = CMQC.MQCBDO_FAIL_IF_QUIESCING | CMQC.MQOO_INPUT_SHARED | CMQC.MQOO_BROWSE;
MQQueue queue = queueManager.accessQueue(queueSettings.getQueue(), openOptions);
De full stacktrace of the error looks like:
com.ibm.mq.MQException: MQJE001: Completion Code '2', Reason '2495'.
at com.ibm.mq.MQSESSION.(MQSESSION.java:2063)
at com.ibm.mq.MQSESSION.getSession(MQSESSION.java:2103)
at com.ibm.mq.MQManagedConnectionJ11.(MQManagedConnectionJ11.java:207)
at com.ibm.mq.MQBindingsManagedConnectionFactoryJ11._createManagedConnection(MQBindingsManagedConnectionFactoryJ11.java:185)
at com.ibm.mq.MQBindingsManagedConnectionFactoryJ11.createManagedConnection(MQBindingsManagedConnectionFactoryJ11.java:230)
at com.ibm.mq.StoredManagedConnection.(StoredManagedConnection.java:96)
at com.ibm.mq.MQSimpleConnectionManager.allocateConnection(MQSimpleConnectionManager.java:194)
at com.ibm.mq.MQQueueManagerFactory.obtainBaseMQQueueManager(MQQueueManagerFactory.java:758)
at com.ibm.mq.MQQueueManagerFactory.procure(MQQueueManagerFactory.java:706)
at com.ibm.mq.MQQueueManagerFactory.constructQueueManager(MQQueueManagerFactory.java:670)
at com.ibm.mq.MQQueueManagerFactory.createQueueManager(MQQueueManagerFactory.java:145)
at com.ibm.mq.MQQueueManager.(MQQueueManager.java:675)
at com.atlascopco.cpq.connections.MQConnection.readMessagesFromQueue(MQConnection.java:92)
at com.atlascopco.cpq.tasks.ResponseHandlerTask.run(ResponseHandlerTask.java:43)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)
Caused by: com.ibm.mq.jmqi.JmqiException: CC=2;RC=2495;AMQ8568: The native JNI library 'mqjbnd64' was not found. For a client installation this is expected. [3=mqjbnd64]
at com.ibm.mq.jmqi.local.LocalMQ.loadLib(LocalMQ.java:1202)
at com.ibm.mq.jmqi.local.LocalMQ$1.run(LocalMQ.java:272)
at java.security.AccessController.doPrivileged(Native Method)
at com.ibm.mq.jmqi.local.LocalMQ.initialise_inner(LocalMQ.java:260)
at com.ibm.mq.jmqi.local.LocalMQ.initialise(LocalMQ.java:223)
at com.ibm.mq.jmqi.local.LocalMQ.(LocalMQ.java:1255)
at com.ibm.mq.jmqi.local.LocalServer.(LocalServer.java:219)
at sun.reflect.GeneratedConstructorAccessor10933.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.ibm.mq.jmqi.JmqiEnvironment.getInstance(JmqiEnvironment.java:656)
at com.ibm.mq.jmqi.JmqiEnvironment.getMQI(JmqiEnvironment.java:590)
at com.ibm.mq.MQSESSION.(MQSESSION.java:2056)
... 15 common frames omitted
Caused by: java.lang.UnsatisfiedLinkError: no mqjbnd64 in java.library.path
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at com.ibm.mq.jmqi.local.LocalMQ.loadLib(LocalMQ.java:1146)
... 27 common frames omitted
How can I find the issue?
回答1:
The issue is in your stack trace:
Caused by: com.ibm.mq.jmqi.JmqiException: CC=2;RC=2495;AMQ8568: The native JNI library 'mqjbnd64' was not found. For a client installation this is expected. [3=mqjbnd64]
Caused by: java.lang.UnsatisfiedLinkError: no mqjbnd64 in java.library.path
This is documented on the IBM MQ Knowledge center page "Configuring the Java Native Interface (JNI) libraries"
On windows the default location for the libraries are below:
MQ_INSTALLATION_PATH\java\lib (32-bit libraries)
MQ_INSTALLATION_PATH\java\lib64 (64-bit libraries)
You can specify the location of this library one of two ways (both examples below would be for a 64bit JRE if MQ is installed in the default location, if you are running a 32bit JRE use the lib directory instead of the lib64 directory):
- With a JVM argument, for example:
-Djava.library.path=C:\Program Files\IBM\MQ\java\lib64 - Via an OS environment variable. In your case on Windows use:
set PATH=C:\Program Files\IBM\MQ\java\lib64;%PATH%
来源：https://stackoverflow.com/questions/45173135/connecting-to-mq-manager-get-mq-error-2495