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From "Liquan Pei (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KAFKA-3690) Avoid passing null pointers to UnModifiableMap
Date Tue, 10 May 2016 18:26:12 GMT
Liquan Pei created KAFKA-3690:
---------------------------------

             Summary: Avoid passing null pointers to UnModifiableMap
                 Key: KAFKA-3690
                 URL: https://issues.apache.org/jira/browse/KAFKA-3690
             Project: Kafka
          Issue Type: Bug
          Components: KafkaConnect
    Affects Versions: 0.10.0.0
            Reporter: Liquan Pei
            Assignee: Liquan Pei
            Priority: Blocker
             Fix For: 0.10.0.0


For some version of JDK, if we pass null to UnModifiableMap's constructor, an NullPointerException
will be thrown. 

This is produced by 
curl -X POST -H "Content-Type: application/json" --data '{"name": "local-conscq!-source",
"config": {"connector.class":"org.apache.kafka.connect.file.FileStreamSourceConnector", "tasks.max":"1",
"topic":"connect-test" }}' http://localhost:8083/connectors

2016-05-09 12:36:03,974] INFO Starting connectors and tasks using config offset -1 (org.apache.kafka.connect.runtime.distributed.DistributedHerder:639)
[2016-05-09 12:36:03,974] INFO Finished starting connectors and tasks (org.apache.kafka.connect.runtime.distributed.DistributedHerder:659)
[2016-05-09 12:36:42,691] WARN  (org.eclipse.jetty.servlet.ServletHandler:620)
javax.servlet.ServletException: java.lang.NullPointerException
	at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:487)
	at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:425)
	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:383)
	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:336)
	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:223)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:808)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:587)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
	at org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:159)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
	at org.eclipse.jetty.server.Server.handle(Server.java:499)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
	at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
	at java.util.Collections$UnmodifiableMap.<init>(Collections.java:1446)
	at java.util.Collections.unmodifiableMap(Collections.java:1433)
	at org.apache.kafka.connect.data.SchemaBuilder.parameters(SchemaBuilder.java:184)
	at org.apache.kafka.connect.json.JsonConverter.asJsonSchema(JsonConverter.java:415)
	at org.apache.kafka.connect.json.JsonConverter.asJsonSchema(JsonConverter.java:398)
	at org.apache.kafka.connect.json.JsonConverter.convertToJsonWithEnvelope(JsonConverter.java:551)
	at org.apache.kafka.connect.json.JsonConverter.fromConnectData(JsonConverter.java:305)
	at org.apache.kafka.connect.storage.KafkaConfigStorage.putConnectorConfig(KafkaConfigStorage.java:282)
	at org.apache.kafka.connect.runtime.distributed.DistributedHerder$4.call(DistributedHerder.java:428)
	at org.apache.kafka.connect.runtime.distributed.DistributedHerder$4.call(DistributedHerder.java:407)
	at org.apache.kafka.connect.runtime.distributed.DistributedHerder.tick(DistributedHerder.java:210)
	at org.apache.kafka.connect.runtime.distributed.DistributedHerder.run(DistributedHerder.java:159)
	... 1 more
[2016-05-09 12:36:42,694] INFO 127.0.0.1 - - [09/May/2016:19:36:42 +0000] "POST /connectors
HTTP/1.1" 500 294  133 (org.apache.kafka.connect.runtime.rest.RestServer:60)
[2016-05-09 12:36:42,694] WARN /connectors (org.eclipse.jetty.server.HttpChannel:395)
javax.servlet.ServletException: javax.servlet.ServletException: java.lang.NullPointerException
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:130)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
	at org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:159)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
	at org.eclipse.jetty.server.Server.handle(Server.java:499)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
	at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
	at java.lang.Thread.run(Thread.java:745)
Caused by: javax.servlet.ServletException: java.lang.NullPointerException
	at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:487)
	at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:425)
	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:383)
	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:336)
	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:223)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:808)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:587)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
	... 10 more
Caused by: java.lang.NullPointerException
	at java.util.Collections$UnmodifiableMap.<init>(Collections.java:1446)
	at java.util.Collections.unmodifiableMap(Collections.java:1433)
	at org.apache.kafka.connect.data.SchemaBuilder.parameters(SchemaBuilder.java:184)
	at org.apache.kafka.connect.json.JsonConverter.asJsonSchema(JsonConverter.java:415)
	at org.apache.kafka.connect.json.JsonConverter.asJsonSchema(JsonConverter.java:398)
	at org.apache.kafka.connect.json.JsonConverter.convertToJsonWithEnvelope(JsonConverter.java:551)
	at org.apache.kafka.connect.json.JsonConverter.fromConnectData(JsonConverter.java:305)
	at org.apache.kafka.connect.storage.KafkaConfigStorage.putConnectorConfig(KafkaConfigStorage.java:282)
	at org.apache.kafka.connect.runtime.distributed.DistributedHerder$4.call(DistributedHerder.java:428)
	at org.apache.kafka.connect.runtime.distributed.DistributedHerder$4.call(DistributedHerder.java:407)
	at org.apache.kafka.connect.runtime.distributed.DistributedHerder.tick(DistributedHerder.java:210)
	at org.apache.kafka.connect.runtime.distributed.DistributedHerder.run(DistributedHerder.java:159)
	... 1 more
[2016-05-09 12:36:42,696] WARN Could not send response error 500: javax.servlet.ServletException:
javax.servlet.ServletException: java.lang.NullPointerException (org.eclipse.jetty.server.HttpChannel:481)




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