ERROR Uncaught exception in REST call to /connectors

[mac2000]

While trying to wire up everything got an java.lang.NullPointerException unfortunately message is empty so there is no way to figure out from where it comes

I do have an kafka connect deployed to local kubernetes (docker for mac), I was successfully started elasticsearch sink but no luck with bigquery

I did grab and compaile master brach so curl -s localhost/connector-plugins | jq shows me:

[
  {
    "class": "com.wepay.kafka.connect.bigquery.BigQuerySinkConnector",
    "type": "sink",
    "version": "1.5.1-SNAPSHOT"
  },
  ...
]

I'm trying to add following connector:

{
  "name": "demo2",
  "config": {
    "connector.class": "com.wepay.kafka.connect.bigquery.BigQuerySinkConnector",
    "tasks.max": "1",
    "topics": "demo2",
    "sanitizeTopics": "true",
    "sanitizeFieldNames": "true",
    "autoCreateTables": "true",
    "autoUpdateSchemas": "true",
    "allBQFieldsNullable": "true",
    "schemaRetriever": "com.wepay.kafka.connect.bigquery.schemaregistry.schemaretriever.SchemaRegistrySchemaRetriever",
    "schemaRegistryLocation": "https://xxxx-xxxxx.us-east1.gcp.confluent.cloud",
    "schemaRegistryClient.basic.auth.credentials.source": "USER_INFO",
    "schemaRegistryClient.schema.registry.basic.auth.user.info": "xxxxxxxxx:yyyyyyyyy",
    "schemaRegistryClient.schema.registry.url": "https://xxxx-xxxxx.us-east1.gcp.confluent.cloud",
    "project": "bq-project",
    "datasets": ".*=demo2",
    "keyfile": "/credentials.json"
  }
}

and receiving back:

{"error_code":500,"message":null}

from worker logs I do see following:

[2020-01-05 14:22:33,076] ERROR Uncaught exception in REST call to /connectors (org.apache.kafka.connect.runtime.rest.errors.ConnectExceptionMapper)
java.lang.NullPointerException
	at org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource.createConnector(ConnectorsResource.java:131)
	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 org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52)
	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:124)
	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:167)
	at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:176)
	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79)
	at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:469)
	at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:391)
	at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:80)
	at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:253)
	at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
	at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
	at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
	at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
	at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
	at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
	at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:232)
	at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:679)
	at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:392)
	at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:365)
	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:318)
	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:873)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:542)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1700)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1667)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220)
	at org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:174)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:505)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:370)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:267)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:698)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:804)
	at java.lang.Thread.run(Thread.java:748)

wondering if there is a way to kind of debug or something like this to figure out what did went wrong?

[anbarasantr]

check if the file path is correct. In my case, the file path passed in the curl was wrong (I was in a wrong folder actually and wasted an hour)