[
https://issues.apache.org/jira/browse/FLINK-2601?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Stephan Ewen reassigned FLINK-2601:
-----------------------------------
Assignee: Stephan Ewen
> IOManagerAsync may produce NPE during shutdown
> ----------------------------------------------
>
> Key: FLINK-2601
> URL: https://issues.apache.org/jira/browse/FLINK-2601
> Project: Flink
> Issue Type: Bug
> Components: Tests
> Affects Versions: 0.10
> Reporter: Robert Metzger
> Assignee: Stephan Ewen
> Priority: Minor
> Labels: test-stability
>
> While analyzing a failed YARN test, I detected that it failed because it
> found the following exception in the logs:
> taskmanager-stderr:
> {code}
> Exception in thread "I/O manager shutdown hook" java.lang.NullPointerException
> at
> org.apache.flink.runtime.io.disk.iomanager.IOManagerAsync.shutdown(IOManagerAsync.java:144)
> at
> org.apache.flink.runtime.io.disk.iomanager.IOManager$1.run(IOManager.java:103)
> {code}
> taskmanager.log
> {code}
> 18:45:00,812 INFO org.apache.flink.runtime.taskmanager.TaskManager
> - Starting TaskManager actor
> 18:45:00,819 INFO org.apache.flink.runtime.io.network.netty.NettyConfig
> - NettyConfig [server address:
> testing-worker-linux-docker-56ee9bbf-3203-linux-2.prod.travis-ci.org/172.17.9.129,
> server port: 38689, memory segment size (bytes): 32768, transport type: NIO,
> number of server threads: 0 (use Netty's default), number of client threads:
> 0 (use Netty's default), server connect backlog: 0 (use Netty's default),
> client connect timeout (sec): 120, send/receive buffer size (bytes): 0 (use
> Netty's default)]
> 18:45:00,822 INFO org.apache.flink.runtime.taskmanager.TaskManager
> - Messages between TaskManager and JobManager have a max timeout of 100000
> milliseconds
> 18:45:00,825 INFO org.apache.flink.runtime.taskmanager.TaskManager
> - Temporary file directory
> '/home/travis/build/rmetzger/flink/flink-yarn-tests/target/flink-yarn-tests-fifo/flink-yarn-tests-fifo-localDir-nm-1_0/usercache/travis/appcache/application_1441046584836_0007':
> total 15 GB, usable 7 GB (46.67% usable)
> 18:45:00,929 INFO
> org.apache.flink.runtime.io.network.buffer.NetworkBufferPool - Allocated 64
> MB for network buffer pool (number of memory segments: 2048, bytes per
> segment: 32768).
> 18:45:01,186 INFO org.apache.flink.runtime.taskmanager.TaskManager
> - Using 0.7 of the currently free heap space for Flink managed memory (236
> MB).
> 18:45:01,755 INFO org.apache.flink.runtime.io.disk.iomanager.IOManager
> - I/O manager uses directory
> /home/travis/build/rmetzger/flink/flink-yarn-tests/target/flink-yarn-tests-fifo/flink-yarn-tests-fifo-localDir-nm-1_0/usercache/travis/appcache/application_1441046584836_0007/flink-io-1befed3c-89c5-4b5e-9043-1b92c4c047d4
> for spill files.
> 18:45:01,831 ERROR org.apache.flink.yarn.appMaster.YarnTaskManagerRunner
> - RECEIVED SIGNAL 15: SIGTERM
> 18:45:01,833 ERROR org.apache.flink.runtime.io.disk.iomanager.IOManagerAsync
> - Error while shutting down IO Manager reader thread.
> java.lang.NullPointerException
> at
> org.apache.flink.runtime.io.disk.iomanager.IOManagerAsync.shutdown(IOManagerAsync.java:133)
> at
> org.apache.flink.runtime.io.disk.iomanager.IOManager$1.run(IOManager.java:103)
> 18:45:01,841 INFO org.apache.flink.runtime.io.disk.iomanager.IOManager
> - I/O manager removed spill file directory
> /home/travis/build/rmetzger/flink/flink-yarn-tests/target/flink-yarn-tests-fifo/flink-yarn-tests-fifo-localDir-nm-1_0/usercache/travis/appcache/application_1441046584836_0007/flink-io-1befed3c-89c5-4b5e-9043-1b92c4c047d4
> {code}
> Looks like the TM is shutting down while still starting up. Hardening this
> should be easy.
> https://s3.amazonaws.com/archive.travis-ci.org/jobs/78052378/log.txt
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
