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Posted to issues@plc4x.apache.org by "Julian Feinauer (Jira)" <ji...@apache.org> on 2020/02/06 21:14:00 UTC
[jira] [Resolved] (PLC4X-158) Too many open files after less than
24 hours of Scraper use
[ https://issues.apache.org/jira/browse/PLC4X-158?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Julian Feinauer resolved PLC4X-158.
-----------------------------------
Fix Version/s: 0.6.0
Resolution: Fixed
> Too many open files after less than 24 hours of Scraper use
> -----------------------------------------------------------
>
> Key: PLC4X-158
> URL: https://issues.apache.org/jira/browse/PLC4X-158
> Project: Apache PLC4X
> Issue Type: Bug
> Components: Util-Scraper
> Affects Versions: 0.5.0
> Reporter: Sebastian Wiendl
> Assignee: Julian Feinauer
> Priority: Blocker
> Fix For: 0.6.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> After less than 24 hours of scraping 9 fields every 100 ms PLC4J starts spewing the following exceptions:{code}2019-12-03 12:35:42.352 WARN 7481 --- [triggeredscraper-scheduling-thread-9] o.a.p.j.s.t.TriggeredScraperTask : Exception during scraping of Job example, Connection-Alias S7: Error-message: null - for stack-trace change logging to DEBUG
> 2019-12-03 12:35:42.352 INFO 7481 --- [triggeredscraper-executor-thread-5] o.a.p.j.s7.connection.S7PlcConnection : Setting up S7 Connection with: host-name 172.30.74.65, rack 0, slot 0, pdu-size 1024, max-amq-caller 8, max-amq-callee 8
> 2019-12-03 12:35:42.355 WARN 7481 --- [triggeredscraper-executor-thread-4] o.a.p.j.s.t.TriggeredScraperImpl : Unable to instantiate connection to s7://172.30.74.65/0/0
> org.apache.plc4x.java.api.exceptions.PlcConnectionException: org.apache.plc4x.java.api.exceptions.PlcConnectionException: Error creating channel.
> at org.apache.plc4x.java.utils.connectionpool.PooledPlcDriverManager.getConnection(PooledPlcDriverManager.java:117) ~[plc4j-connection-pool-0.5.0.jar!/:0.5.0]
> at org.apache.plc4x.java.utils.connectionpool.PooledPlcDriverManager.getConnection(PooledPlcDriverManager.java:100) ~[plc4j-connection-pool-0.5.0.jar!/:0.5.0]
> at org.apache.plc4x.java.scraper.triggeredscraper.TriggeredScraperImpl.lambda$getPlcConnection$2(TriggeredScraperImpl.java:300) ~[plc4j-scraper-0.5.0.jar!/:0.5.0]
> at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590) ~[na:1.8.0_201]
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_201]
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_201]
> at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_201]
> Caused by: org.apache.plc4x.java.api.exceptions.PlcConnectionException: Error creating channel.
> at org.apache.plc4x.java.tcp.connection.TcpSocketChannelFactory.createChannel(TcpSocketChannelFactory.java:87) ~[plc4j-protocol-driver-base-tcp-0.5.0.jar!/:0.5.0]
> at org.apache.plc4x.java.base.connection.NettyPlcConnection.connect(NettyPlcConnection.java:67) ~[plc4j-protocol-driver-base-0.5.0.jar!/:0.5.0]
> at org.apache.plc4x.java.PlcDriverManager.getConnection(PlcDriverManager.java:73) ~[plc4j-api-0.5.0.jar!/:0.5.0]
> at org.apache.plc4x.java.utils.connectionpool.PooledPlcDriverManager.access$201(PooledPlcDriverManager.java:37) ~[plc4j-connection-pool-0.5.0.jar!/:0.5.0]
> at org.apache.plc4x.java.utils.connectionpool.PooledPlcDriverManager$1.create(PooledPlcDriverManager.java:89) ~[plc4j-connection-pool-0.5.0.jar!/:0.5.0]
> at org.apache.plc4x.java.utils.connectionpool.PooledPlcDriverManager$1.create(PooledPlcDriverManager.java:82) ~[plc4j-connection-pool-0.5.0.jar!/:0.5.0]
> at org.apache.commons.pool2.BaseKeyedPooledObjectFactory.makeObject(BaseKeyedPooledObjectFactory.java:60) ~[commons-pool2-2.7.0.jar!/:2.7.0]
> at org.apache.commons.pool2.impl.GenericKeyedObjectPool.create(GenericKeyedObjectPool.java:1041) ~[commons-pool2-2.7.0.jar!/:2.7.0]
> at org.apache.commons.pool2.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:342) ~[commons-pool2-2.7.0.jar!/:2.7.0]
> at org.apache.commons.pool2.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:265) ~[commons-pool2-2.7.0.jar!/:2.7.0]
> at org.apache.plc4x.java.utils.connectionpool.PooledPlcDriverManager.getConnection(PooledPlcDriverManager.java:115) ~[plc4j-connection-pool-0.5.0.jar!/:0.5.0]
> ... 6 common frames omitted
> Caused by: java.lang.IllegalStateException: failed to create a child event loop
> at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:88) ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58) ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:52) ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:88) ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:83) ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:64) ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52) ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:44) ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at org.apache.plc4x.java.tcp.connection.TcpSocketChannelFactory.createChannel(TcpSocketChannelFactory.java:58) ~[plc4j-protocol-driver-base-tcp-0.5.0.jar!/:0.5.0]
> ... 16 common frames omitted
> Caused by: io.netty.channel.ChannelException: failed to open a new selector
> at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:181) ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:147) ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:138) ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:37) ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84) ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> ... 24 common frames omitted
> Caused by: java.io.IOException: Too many open files
> at sun.nio.ch.IOUtil.makePipe(Native Method) ~[na:1.8.0_201]
> at sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:65) ~[na:1.8.0_201]
> at sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:36) ~[na:1.8.0_201]
> at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:179) ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> ... 28 common frames omitted
> {code}Any ideas whats causing this and how to fix?
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