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https://issues.apache.org/jira/browse/KAFKA-5399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16042619#comment-16042619
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Rajini Sivaram commented on KAFKA-5399:
---------------------------------------
[[email protected]] Thank you for reporting this. Both ZooKeeper and Kafka
catch the exception (from the description), generate warning/error, ignore the
error and carry on. Were there other errors in the logs? Did the processes
crash or were they hung? And does this happen every time you run nmap?
> Crash Kafka & Zookeper with an basic Nmap Scan
> ----------------------------------------------
>
> Key: KAFKA-5399
> URL: https://issues.apache.org/jira/browse/KAFKA-5399
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.10.2.1
> Environment: OS-X
> Reporter: Ivan Morozov
>
> Kafka running locally on OS-X can be crashed by an nmap scan. The cluster can
> not be recovered and have to be restarted.
> Reproduce:
> 1.Start
> ```
> zookeeper-server-start /usr/local/etc/kafka/zookeeper.properties &
> kafka-server-start /usr/local/etc/kafka/server.properties
> ```
> 2. Run scan
> ```
> nmap localhost
> ```
> Exceptions from Zookeeper:
> ```
> [2017-06-07 17:14:35,913] INFO Accepted socket connection from /0.0.0.80:0
> (org.apache.zookeeper.server.NIOServerCnxnFactory)
> [2017-06-07 17:14:35,914] WARN Ignoring exception
> (org.apache.zookeeper.server.NIOServerCnxnFactory)
> java.net.SocketException: Invalid argument
> at sun.nio.ch.Net.setIntOption0(Native Method)
> at sun.nio.ch.Net.setSocketOption(Net.java:334)
> at sun.nio.ch.SocketChannelImpl.setOption(SocketChannelImpl.java:190)
> at sun.nio.ch.SocketAdaptor.setBooleanOption(SocketAdaptor.java:271)
> at sun.nio.ch.SocketAdaptor.setTcpNoDelay(SocketAdaptor.java:306)
> at
> org.apache.zookeeper.server.NIOServerCnxn.<init>(NIOServerCnxn.java:105)
> at
> org.apache.zookeeper.server.NIOServerCnxnFactory.createConnection(NIOServerCnxnFactory.java:156)
> at
> org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:197)
> at java.lang.Thread.run(Thread.java:748)
> [2017-06-07 17:14:35,916] WARN Ignoring unexpected runtime exception
> (org.apache.zookeeper.server.NIOServerCnxnFactory)
> java.lang.NullPointerException
> at
> org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:185)
> at java.lang.Thread.run(Thread.java:748)
> ```
> Exceptions from Kafka:
> ```
> [2017-06-07 17:14:17,072] ERROR Error while accepting connection
> (kafka.network.Acceptor)
> java.net.SocketException: Invalid argument
> at sun.nio.ch.Net.setIntOption0(Native Method)
> at sun.nio.ch.Net.setSocketOption(Net.java:334)
> at
> sun.nio.ch.SocketChannelImpl.setOption(SocketChannelImpl.java:190)
> at
> sun.nio.ch.SocketAdaptor.setBooleanOption(SocketAdaptor.java:271)
> at
> sun.nio.ch.SocketAdaptor.setTcpNoDelay(SocketAdaptor.java:306)
> at kafka.network.Acceptor.accept(SocketServer.scala:344)
> at kafka.network.Acceptor.run(SocketServer.scala:283)
> at java.lang.Thread.run(Thread.java:748)
> ```
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