Skywalking Java agent plugin issue

[skundu1234]

We have enabled skywalking Java agent and its able to connect our collector as well but giving this below error in skywlaking-api log.Can you please advise on this.

**JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -XX:MaxRAMPercentage=75.0 -XX:+UseG1GC -XX:+StartAttachListener -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/tmp
The collector IP for the npe server is skywalking-oap.XXXX:443 for perf
container trace environment picked from spinnaker perf
DEBUG 2022-04-29 10:23:27:847 main AgentPackagePath : The beacon class location is jar:file:/releaseapp/skywalking-stage-java-agent-8.10.0/skywalking-agent.jar!/org/apache/skywalking/apm/agent/core/boot/AgentPackagePath.class.
INFO 2022-04-29 10:23:27:851 main SnifferConfigInitializer : Config file found in /releaseapp/skywalking-stage-java-agent-8.10.0/config/agent.config.
INFO 2022-04-29 10:23:27:882 main SnifferConfigInitializer : Agent options is agent.service_name=release-loader,collector.backend_service=skywalking-oap.XXXX:443,profile.active=true.
INFO 2022-04-29 10:23:28:031 main AgentClassLoader : /releaseapp/skywalking-stage-java-agent-8.10.0/plugins/apm-resttemplate-4.3.x-plugin-8.10.0.jar loaded.
INFO 2022-04-29 10:23:28:032 main AgentClassLoader : /releaseapp/skywalking-stage-java-agent-8.10.0/plugins/apm-vertx-core-3.x-plugin-8.10.0.jar loaded.
ERROR 2022-04-29 10:23:28:033 main AgentClassLoader : ._apm-mongodb-2.x-plugin-8.10.0.jar jar file can't be resolved
java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.(ZipFile.java:225)
at java.util.zip.ZipFile.(ZipFile.java:155)
at java.util.jar.JarFile.(JarFile.java:166)
at java.util.jar.JarFile.(JarFile.java:130)
at org.apache.skywalking.apm.agent.core.plugin.loader.AgentClassLoader.doGetJars(AgentClassLoader.java:195)
at org.apache.skywalking.apm.agent.core.plugin.loader.AgentClassLoader.getAllJars(AgentClassLoader.java:177)
at org.apache.skywalking.apm.agent.core.plugin.loader.AgentClassLoader.findResources(AgentClassLoader.java:138)
at java.lang.ClassLoader.getResources(ClassLoader.java:1142)
at org.apache.skywalking.apm.agent.core.plugin.PluginResourcesResolver.getResources(PluginResourcesResolver.java:40)
at org.apache.skywalking.apm.agent.core.plugin.PluginBootstrap.loadPlugins(PluginBootstrap.java:45)
at org.apache.skywalking.apm.agent.SkyWalkingAgent.premain(SkyWalkingAgent.java:80)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:386)
at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:401)

ERROR 2022-04-29 10:23:28:046 main AgentClassLoader : ._apm-elasticsearch-5.x-plugin-8.10.0.jar jar file can't be resolved
java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.(ZipFile.java:225)
at java.util.zip.ZipFile.(ZipFile.java:155)
at java.util.jar.JarFile.(JarFile.java:166)
at java.util.jar.JarFile.(JarFile.java:130)
at org.apache.skywalking.apm.agent.core.plugin.loader.AgentClassLoader.doGetJars(AgentClassLoader.java:195)
at org.apache.skywalking.apm.agent.core.plugin.loader.AgentClassLoader.getAllJars(AgentClassLoader.java:177)
at org.apache.skywalking.apm.agent.core.plugin.loader.AgentClassLoader.findResources(AgentClassLoader.java:138)
at java.lang.ClassLoader.getResources(ClassLoader.java:1142)
at org.apache.skywalking.apm.agent.core.plugin.PluginResourcesResolver.getResources(PluginResourcesResolver.java:40)
at org.apache.skywalking.apm.agent.core.plugin.PluginBootstrap.loadPlugins(PluginBootstrap.java:45)
at org.apache.skywalking.apm.agent.SkyWalkingAgent.premain(SkyWalkingAgent.java:80)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:386)
at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:401)

INFO 2022-04-29 10:23:28:047 main AgentClassLoader : /releaseapp/skywalking-stage-java-agent-8.10.0/plugins/apm-jetty-server-9.x-plugin-8.10.0.jar loaded.
INFO 2022-04-29 10:23:28:048 main AgentClassLoader : /releaseapp/skywalking-stage-java-agent-8.10.0/plugins/apm-httpasyncclient-4.x-plugin-8.10.0.jar loaded.
ERROR 2022-04-29 10:23:28:049 main AgentClassLoader : ._apm-spring-concurrent-util-4.x-plugin-8.10.0.jar jar file can't be resolved
java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.(ZipFile.java:225)
at java.util.zip.ZipFile.(ZipFile.java:155)
at java.util.jar.JarFile.(JarFile.java:166)
at java.util.jar.JarFile.(JarFile.java:130)
**

[wu-sheng]

._apm-spring-concurrent-util-4.x-plugin-8.10.0.jar Notice the ._ prefix, this is not the file we released. Check your own env.

[skundu1234]

We have seen that plugin is correct with apm-spring-concurrent-util-4.x-plugin-8.10.0.jar inside plugins folder and some are already loaded with info .We need your advise more on this and could not find much details to debug.
We did not see with ._apm-spring-concurrent-util-4.x-plugin-8.10.0.jar file anywhere in plugin,option plugins,activations.Not sure how _ underscore is coming.

Other applications are working fine with this agent so please advise what could be the issue.

[wu-sheng]

We don't know either. This is reported by your env logs.

[skundu1234]

we observed issues with the applications using “openjdk:8-jdk-alpine” base-image in docker file. Its working fine with adoptopenjdk:11-jre-hotspot image .We observed this above error while using this image and most applications are using this image for our organisation so what could be the solution can you please check.

[skundu1234]

Please update if Apache skywalking works only mentioned image mentioned in document.

https://skywalking.apache.org/docs/skywalking-java/v8.10.0/en/setup/service-agent/java-agent/plugin-test/

[Superskyyy]

Answered and solved in #9012