Sebastian Wiendl created PLC4X-158:
--------------------------------------
Summary: Too many open files after less than 24 hours of Scraper
user
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
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?
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
