amqx NullPointerException: Cannot invoke "java.lang.Throwable.toString()" because the return value of "java.lang.Throwable.getCause()" is null

[jiridanek]

cli-java/cli-activemq-jmx/src/main/java/com/redhat/amqx/management/ObjectReader.java

Lines 99 to 106 in 52ed86e

	} catch (IllegalAccessException | IllegalArgumentException e) {
	throw new DestinationException(
	String.format("Unable to access '%s' of '%s' object!", object.getClass(), method.getName()));
	} catch (Throwable e) {
	logger.debug(e.getCause().toString());
	}
	return methodPropertyMap;
	}

[13:12:00] [FAIL] dtestlib.Test :: [root@10.0.202.30]$ /opt/miniconda3/envs/tn/bin/python3 -u /var/dtests/node_data/clients/cli_wrapper.py  -DDTESTS_PID=5477 -DC_KILLTIME=60 -DC_HANG_ANALYSIS_ENA=0 -DC_CRASH_ANALYSIS_ENA=0 -DC_CRASH_FILE_DELETE_ENA=0  java  -jar /var/dtests/node_data/clients/amqx.jar  queue --host 10.0.202.30:1099 --username admin --password admin --action properties --name 'test_receive_ttl_message_in_half_life' # ecode:254 (exp. True), dur.:1.07 err_cnt:4
[13:12:00] [INFO] dtestlib.Test :: stdout:
  Unable to properties queue: Cannot invoke "java.lang.Throwable.toString()" because the return value of "java.lang.Throwable.getCause()" is null
  java.lang.NullPointerException: Cannot invoke "java.lang.Throwable.toString()" because the return value of "java.lang.Throwable.getCause()" is null
  	at com.redhat.amqx.management.ObjectReader.extractMethodProperty(ObjectReader.java:103)
  	at com.redhat.amqx.management.ObjectReader.getObjectProperties(ObjectReader.java:165)
  	at com.redhat.amqx.management.artemis.AbstractArtemisManager.getDestinationProperties(AbstractArtemisManager.java:180)
  	at com.redhat.amqx.management.artemis.DestinationArtemisManager.getDestinationProperties(DestinationArtemisManager.java:138)
  	at com.redhat.amqx.main.actions.QueueAction.run(QueueAction.java:107)
  	at com.redhat.amqx.main.Main.main(Main.java:52)

Some throwables don't have a cause.

[jiridanek]

Reproduce this when using https://download-node-02.eng.bos.redhat.com/rcm-guest/staging/amq/amq-broker-7.11.0.CR1/amq-broker-7.11.0.CR1-bin.zip broker

[jiridanek]

java.lang.ClassCastException: class java.lang.Long cannot be cast to class java.lang.Integer (java.lang.Long and java.lang.Integer are in module java.base of loader 'bootstrap')
	at jdk.proxy2/jdk.proxy2.$Proxy14.getNumberOfPages(Unknown Source)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at com.redhat.amqx.management.ProxyHandler.invoke(ObjectReader.java:189)
	at com.redhat.amqx.management.ObjectReader.extractMethodProperty(ObjectReader.java:88)
	at com.redhat.amqx.management.ObjectReader.getObjectProperties(ObjectReader.java:168)
	at com.redhat.amqx.management.artemis.AbstractArtemisManager.getDestinationProperties(AbstractArtemisManager.java:180)
	at com.redhat.amqx.management.artemis.DestinationArtemisManager.getDestinationProperties(DestinationArtemisManager.java:138)
	at com.redhat.amqx.main.actions.QueueAction.run(QueueAction.java:107)
	at com.redhat.amqx.main.Main.main(Main.java:52)
	at com.redhat.amqx.AmqxMainTests.queueProperties(MainTest.java:32)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:727)
	at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
	at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:156)
	at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:147)
	at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:86)
	at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103)
	at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.lambda$invoke$0(InterceptingExecutableInvoker.java:93)
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)

[jiridanek]

And, the author of the change seems to be @clebertsuconic, who changed the type of the return value of getNumberOfPages from int to long in apache/artemis#4101, apache/artemis@342565d#diff-0d4c38e316b8b8defd6ef45ef5a40f402fc4ec5673d4b3756887aea161ef2246L101-R101 and since we are compiling against an older Artemis (we happen to use artemis-core-client-2.20.0.redhat-00008.jar) which has still an int type in the interface, we fail like that.