ehcache Management and Monitoring class not found NmsAgentEntity

Nadeem Amin

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Dec 18, 2017, 2:37:14 PM12/18/17

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version o
jdk 1.8

i am using Ehcache : 3.4.0 tool kit , and trying to setup mgmt and monitoring using the sample code. The sample code for mgmt and monitoring of ehcache results in classnotfound error.

the NmsAgentEntity class is no where to be found. according to a developer , i am missing Terracotta platform client jar . but don't know where is this jar ?

primary used in the class :
https://github.com/ehcache/ehcache3/blob/2b3cf5da4480f8a74d903c1d112591a4844347e1/management/src/main/java/org/ehcache/management/cluster/DefaultClusteringManagementService.java

stacktrace

gov.cbp.ace.st.common.cache.ClusteredCacheManagerTest.testTvsClusteredCacheManager(ClusteredCacheManagerTest.java:54)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:95)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:507)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:121)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.ClassNotFoundException: org.terracotta.management.entity.nms.agent.client.NmsAgentEntity
at java.net.URLClassLoader.findClass(URLClassLoader.java:607)
at java.lang.ClassLoader.loadClassHelper(ClassLoader.java:844)
at java.lang.ClassLoader.loadClass(ClassLoader.java:823)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:325)
at java.lang.ClassLoader.loadClass(ClassLoader.java:803)
... 26 more

sample code

DefaultManagementRegistryConfiguration registryConfiguration = new DefaultManagementRegistryConfiguration().setCacheManagerAlias("myCacheManager1");
ManagementRegistryService managementRegistry = new DefaultManagementRegistryService(registryConfiguration);

CacheConfiguration<Long, String> cacheConfiguration = CacheConfigurationBuilder.newCacheConfigurationBuilder(Long.class, String.class,
ResourcePoolsBuilder.newResourcePoolsBuilder().heap(1, MemoryUnit.MB).offheap(2, MemoryUnit.MB))
.build();

cacheManager = CacheManagerBuilder.newCacheManagerBuilder()
.withCache("myCache", cacheConfiguration)
.using(managementRegistry)
.build(true);

Contribut

Anthony Dahanne

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Dec 18, 2017, 2:53:53 PM12/18/17

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Hello Nadeem,

Can you give us the exact the URL of the kit you downloaded and used ?

Can you show to us your exact classpath ? (if you run from your IDE, try to get us the exact java -jar invocation)

Thanks

Nadeem Amin

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Dec 19, 2017, 7:30:48 AM12/19/17

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the link for 3.4.0 is : https://github.com/ehcache/ehcache3/releases/download/v3.4.0/ehcache-clustered-3.4.0-kit.zip

Henri Tremblay

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Dec 19, 2017, 10:00:22 AM12/19/17

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And where have you found DefaultManagementRegistryConfiguration?

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Anthony Dahanne

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Dec 19, 2017, 12:38:45 PM12/19/17

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Hello Nadeem,

There is no public stats API yet.

You may want to star this issue : https://github.com/ehcache/ehcache3/issues/1940

Meanwhile, have a look at this example, it should help you out :

https://github.com/anthonydahanne/ehcache3-samples/tree/management-sample/management-sample

Anthony

Nadeem Amin

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Dec 20, 2017, 8:24:14 AM12/20/17

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the sample code works fine but when i switch to the terracotta based cache config, i still get class not found error . i have both jars in the path.

init code :

managementRegistry = new DefaultManagementRegistryService(

new DefaultManagementRegistryConfiguration().setCacheManagerAlias(poolType.name())

.addTags("caching", "client"));

CacheManagerBuilder<PersistentCacheManager> clusteredCacheManagerBuilder = newCacheManagerBuilder()

.using(managementRegistry)

.with(cluster(URI.create(url))

.readOperationTimeout(2, TimeUnit.SECONDS)

.autoCreate())

.withCache(poolType.name(),

newCacheConfigurationBuilder(keyType, CacheContainer.class,

ResourcePoolsBuilder.newResourcePoolsBuilder()

.heap(1, EntryUnit.ENTRIES)

.offheap(1, MemoryUnit.MB)

.with(clusteredDedicated("primary-server-resource", 2, MemoryUnit.MB)))

.add(new ClusteredStoreConfiguration(Consistency.EVENTUAL)));

print code :

Context context = Context.empty()

.with("cacheManagerName", poolType.name())

.with("cacheName", poolType.name());

ContextualStatistics statistics1 = managementRegistry.withCapability("StatisticsCapability")

.queryAllStatistics().on(context).build().execute().getResult(context);

logger.info("Statistics : " + poolType.name() + ":::" + new TreeMap(statistics1.getStatistics()).toString());

ERROR Message

08:17:36.358 [Connection Maker - 3e91d28118d2464fbed55e965185aa4c] INFO com.tc.object.DistributedObjectClient - Connection successfully established to server at xxxx:8090

Error occured in testing :org/terracotta/management/entity/nms/agent/client/NmsAgentEntity

java.lang.NoClassDefFoundError: org/terracotta/management/entity/nms/agent/client/NmsAgentEntity

at org.ehcache.management.cluster.DefaultClusteringManagementService.start(DefaultClusteringManagementService.java:89)

at org.ehcache.management.registry.DefaultManagementRegistryService.start(DefaultManagementRegistryService.java:82)

at org.ehcache.core.internal.service.ServiceLocator.startAllServices(ServiceLocator.java:118)

at org.ehcache.core.EhcacheManager.init(EhcacheManager.java:560)

at org.ehcache.config.builders.CacheManagerBuilder.build(CacheManagerBuilder.java:72)

at gov.cbp.ace.st.common.cache.ClusteredCacheManager.init(ClusteredCacheManager.java:216)

at gov.cbp.ace.st.common.cache.ClusteredCacheManager.getCache(ClusteredCacheManager.java:142)

at gov.cbp.ace.st.common.cache.ClusteredCacheManager.saveValue(ClusteredCacheManager.java:306)

at gov.cbp.ace.st.common.cache.ClusteredCacheManager.saveValue(ClusteredCacheManager.java:323)

at gov.cbp.ace.st.common.cache.ClusteredCacheManager.monitorCache(ClusteredCacheManager.java:343)

at gov.cbp.ace.st.common.cache.ClusteredCacheManagerTest.testMOnitorClusteredCacheManager(ClusteredCacheManagerTest.java:70)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:95)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)

at java.lang.reflect.Method.invoke(Method.java:507)

at junit.framework.TestCase.runTest(TestCase.java:154)

at junit.framework.TestCase.runBare(TestCase.java:127)

at junit.framework.TestResult$1.protect(TestResult.java:106)

at junit.framework.TestResult.runProtected(TestResult.java:124)

at junit.framework.TestResult.run(TestResult.java:109)

at junit.framework.TestCase.run(TestCase.java:118)

at junit.framework.TestSuite.runTest(TestSuite.java:208)

at junit.framework.TestSuite.run(TestSuite.java:203)

at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:86)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)

at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

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Anthony Dahanne

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Dec 20, 2017, 10:19:52 PM12/20/17

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Hello Nadeem,

True, it's bit different with clustered and the monitoring stack.

You need to do 2 things :

* add the jar named mnm-nms-agent to your client classpath

* add the jar named mnm-server.jar to your server/plugins/lib server folder

And it should work

I have updated the github project with the jar coordinates

https://github.com/anthonydahanne/ehcache3-samples/tree/management-sample/management-sample

REMEMBER : it's not official API, things can break and change anytime, please watch https://github.com/ehcache/ehcache3/issues/1940

Nadeem Amin

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Dec 21, 2017, 9:39:09 AM12/21/17

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Greatly Appreciate your response and effort to help me get this done. This works perfectly