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Troubleshooting · vmware-archive/admiral Wiki · GitHub
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Troubleshooting
Lazarin Lazarov edited this page Mar 27, 2018
·
4 revisions
- Docker hosts do not have memory and cpu statistics displayed.
- Admiral agent container is in state ERROR
- Admiral agent container logs contains:
Admiral Agent started successfully!
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x401310]
goroutine 1 [running]:
panic(0x7f4920, 0xc82000a0b0)
/usr/local/go/src/runtime/panic.go:464 +0x3e6
main.startDockerEventListener()
/go/src/containerproxymapper/containerproxymapper.go:33 +0x1d0
main.main()
/go/src/containerproxymapper/containerproxymapper.go:21 +0x108
Admiral agent uses unix socket file for communication with docker daemon. The path to it should be /var/run/docker.sock
Add (or edit) docker starting arguments to contain following option
-H unix:///var/run/docker.sock'
By default error stacktrace is not sent with the error response, so the client receives error like:
{
statusCode: 500,
documentKind: "com:vmware:xenon:common:ServiceErrorResponse",
errorCode: 0
}
This can be configured to make it easier when troubleshooting an issue. Parameter XENON_ENABLE_STACKTRACE should be set to true either when starting the container or afterwards:
- when running the container add the following argument to the docker command
-e XENON_ENABLE_STACKTRACE=true
- when container is already running (let's say its name is admiral-container), execute following command and then restart the container:
docker exec -u root admiral-container ex -sc '%s/disableStackTraceCollection=true/disableStackTraceCollection=false/g|x' /entrypoint.sh
docker restart admiral-container
Now stacktrace is propagated to the client, e.g.:
{
stackTrace: [
"com.vmware.xenon.common.Operation.completeOrFail(Operation.java:1340)",
"com.vmware.xenon.common.Operation.complete(Operation.java:1239)",
"com.vmware.xenon.common.FactoryService.handleGet(FactoryService.java:556)",
"com.vmware.xenon.common.FactoryService.handleRequest(FactoryService.java:304)",
"com.vmware.xenon.common.FactoryService.handleRequest(FactoryService.java:273)",
"com.vmware.xenon.common.ServiceHost.lambda$queueOrScheduleRequestInternal$45(ServiceHost.java:4301)",
"java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402)",
"java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)",
"java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)",
"java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)",
"java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)",
],
statusCode: 500,
documentKind: "com:vmware:xenon:common:ServiceErrorResponse",
errorCode: 0
}
To restore the default behavior execute:
docker exec -u root admiral-container ex -sc '%s/disableStackTraceCollection=false/disableStackTraceCollection=true/g|x' /entrypoint.sh
docker restart admiral-container
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