java.lang.NoClassDefFoundError: Could not initialize class com.twitter.finagle.stats.DefaultStatsReceiver$

Elastic Stack Elasticsearch
1

Got the following error when executing our custom elasticsearch plugin.

Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.twitter.finagle.stats.DefaultStatsReceiver$
        at com.twitter.finagle.stats.DefaultStatsReceiver.scope(LoadedStatsReceiver.scala) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.discoveryapi.client.servicemetrics.ZipkinAPITracer.getTracer(ZipkinAPITracer.java:235) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.discoveryapi.client.servicemetrics.ZipkinAPITracer.clientSend(ZipkinAPITracer.java:98) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.discoveryapi.client.MetricsServiceDiscoveryLookup.lookupService(MetricsServiceDiscoveryLookup.java:55) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.http.impl.WeURLProviderImpl$2.invoke(WeURLProviderImpl.java:93) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.http.impl.WeURLProviderImpl$DefaultInvocationHandler.invoke(WeURLProviderImpl.java:153) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.http.impl.WeURLProviderImpl.nextService(WeURLProviderImpl.java:90) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.http.impl.WeURLProviderImpl.<init>(WeURLProviderImpl.java:69) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.http.impl.WeURLProviderImpl.<init>(WeURLProviderImpl.java:57) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.http.impl.LazyWeURLProviderImpl$1.get(LazyWeURLProviderImpl.java:53) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.http.impl.LazyWeURLProviderImpl$1.get(LazyWeURLProviderImpl.java:49) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.google.common.base.Suppliers$NonSerializableMemoizingSupplier.get(Suppliers.java:160) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.http.impl.LazyWeURLProviderImpl.get(LazyWeURLProviderImpl.java:111) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.http.impl.LazyWeURLProviderImpl.get(LazyWeURLProviderImpl.java:42) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.commons.http.jersery.JerseyURLProvider.<init>(JerseyURLProvider.java:56) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.commons.http.jersery.JerseyURLProvider.create(JerseyURLProvider.java:84) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.sts.client.impl.StsServiceRESTClientImpl.getStsWebTarget(StsServiceRESTClientImpl.java:330) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.sts.client.impl.StsServiceRESTClientImpl.getValidationCert(StsServiceRESTClientImpl.java:173) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.sts.IdentityTokenJWT.getValidationCertImpl(IdentityTokenJWT.java:284) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.sts.IdentityTokenJWT.access$000(IdentityTokenJWT.java:70) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.sts.IdentityTokenJWT$1.create(IdentityTokenJWT.java:97) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.sts.IdentityTokenJWT$1.create(IdentityTokenJWT.java:94) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        at com.issinc.we.utils.factory.FactoryUtils.lambda$memoize$0(FactoryUtils.java:62) ~[we-elastic-svc-2.1.3-SNAPSHOT.jar:?]
        ... 64 more

I verified that com.twitter.finagle.stats.DefaultStatsReceiver is included in the plugin jar. Any idea on what could be going on?

2

Can you please provide more information about how you build your plugin? Do you have an example binary that can be inspected?

3

It's a fat jar with all the classes, properties files, spring configs, etc. included.

elasticsearch-classnotfound-error
elasticsearch-classnotfound-error.jpg1228×733 287 KB

We're on version 6.2.2.

4

It seems like ES6 has problem loading anonymous inner class (DefaultStatsReceiver in this case). Any suggestion to get around it?

5

Elastic does not support embedding the server. You should instead launch Elasticsearch using the standard distribution start script and connect to it with the java client.

6

Can you elaborate? We install elasticsearch via docker and run it as a server. We then install our plugin using the 'bin/elasticsearch-plugin install' command. The plugin, which connects to our existing services, goes through all the ES security and bootstrap checks.

How should we do it differently?

7

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