java.lang.NullPointerException: This exception has no message.

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This exception has no message.
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This exception has no message.
java.lang.NullPointerException:
at java.util.Hashtable.put(Hashtable.java:401)
at oracle.jms.AQjmsMessage.convertPropertyListToHashtable(AQjmsMessage.java:2373)
at oracle.jms.AQjmsConsumer.dequeue(AQjmsConsumer.java:2012)
at oracle.jms.AQjmsConsumer.receiveFromAQ(AQjmsConsumer.java:914)
at oracle.jms.AQjmsConsumer.receiveFromAQ(AQjmsConsumer.java:833)
at oracle.jms.AQjmsConsumer.receiveNoWait(AQjmsConsumer.java:756)
at aqapitest.TestAqJms.main(TestAqJms.java:104)

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