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Failed to index Provenance Events org.apache.lucene.store.AlreadyClosedException: this IndexWriter is closed || Caused by: java.nio.file.FileSystemException

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Nifi provenance data is not visible and remains at 80% in searching for provenance events after upgrading from 1.13.0 to 1.15.3

Below are the error logs :

2022-04-05 23:51:22,905 ERROR [Index Provenance Events-2] o.a.n.p.index.lucene.EventIndexTask Failed to index Provenance Events
org.apache.lucene.store.AlreadyClosedException: this IndexWriter is closed
at org.apache.lucene.index.IndexWriter.ensureOpen(IndexWriter.java:877)
at org.apache.lucene.index.IndexWriter.ensureOpen(IndexWriter.java:891)
at org.apache.lucene.index.IndexWriter.updateDocuments(IndexWriter.java:1468)
at org.apache.lucene.index.IndexWriter.addDocuments(IndexWriter.java:1444)
at org.apache.nifi.provenance.lucene.LuceneEventIndexWriter.index(LuceneEventIndexWriter.java:70)
at org.apache.nifi.provenance.index.lucene.EventIndexTask.index(EventIndexTask.java:202)
at org.apache.nifi.provenance.index.lucene.EventIndexTask.run(EventIndexTask.java:113)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.nio.file.FileSystemException: /provenance_repo/provenance_repository/lucene-8-index-1647749380623/_vd_Lucene80_0.dvd: Too many open files
at sun.nio.fs.UnixException.translateToIOException(UnixException.java:91)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
at sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:214)
at java.nio.file.spi.FileSystemProvider.newOutputStream(FileSystemProvider.java:434)
at java.nio.file.Files.newOutputStream(Files.java:216)
at org.apache.lucene.store.FSDirectory$FSIndexOutput.<init>(FSDirectory.java:410)
at org.apache.lucene.store.FSDirectory$FSIndexOutput.<init>(FSDirectory.java:406)
at org.apache.lucene.store.FSDirectory.createOutput(FSDirectory.java:254)
at org.apache.lucene.store.LockValidatingDirectoryWrapper.createOutput(LockValidatingDirectoryWrapper.java:44)
at org.apache.lucene.store.TrackingDirectoryWrapper.createOutput(TrackingDirectoryWrapper.java:43)
at org.apache.lucene.codecs.lucene80.Lucene80DocValuesConsumer.<init>(Lucene80DocValuesConsumer.java:79)
at org.apache.lucene.codecs.lucene80.Lucene80DocValuesFormat.fieldsConsumer(Lucene80DocValuesFormat.java:161)
at org.apache.lucene.codecs.perfield.PerFieldDocValuesFormat$FieldsWriter.getInstance(PerFieldDocValuesFormat.java:227)
at org.apache.lucene.codecs.perfield.PerFieldDocValuesFormat$FieldsWriter.getInstance(PerFieldDocValuesFormat.java:163)
at org.apache.lucene.codecs.perfield.PerFieldDocValuesFormat$FieldsWriter.addNumericField(PerFieldDocValuesFormat.java:109)
at org.apache.lucene.index.NumericDocValuesWriter.flush(NumericDocValuesWriter.java:108)
at org.apache.lucene.index.DefaultIndexingChain.writeDocValues(DefaultIndexingChain.java:345)
at org.apache.lucene.index.DefaultIndexingChain.flush(DefaultIndexingChain.java:225)
at org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:350)
at org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:476)
at org.apache.lucene.index.DocumentsWriter.flushAllThreads(DocumentsWriter.java:656)
at org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:3365)
at org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:3771)
at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:3729)
at org.apache.nifi.provenance.lucene.LuceneEventIndexWriter.commit(LuceneEventIndexWriter.java:101)
at org.apache.nifi.provenance.index.lucene.EventIndexTask.commit(EventIndexTask.java:253)
at org.apache.nifi.provenance.index.lucene.EventIndexTask.index(EventIndexTask.java:232)
... 6 common frames omitted

@MattWho Please help on this

Apache NiFi

Neil_1992Answer

Gold ⭐️

Hi All,

we need to increase open file limit for nifi as a service not user , so add the below line in your

nifi.service file and restart the server , it should resolve this issue

LimitNOFILE=999999

maykiwogno

Silver ⭐️⭐️⭐️

Hello @Neil_1992

I've got the same error after upgrade from 1.11.4 to 1.15.3

For this moment, I don't have any information about this error.

Hope to found it one day.

regards

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Neil_1992Author

Gold ⭐️

@MattWho , can you please help us on this , looks like this is common with Nifi 1.15.3 version which happens to be the latest one

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smdas

Gold ⭐️⭐️

Hello @Neil_1992 & @maykiwogno

While we wait for our Nifi Guru @MattWho review, Wish to provide a bit of information on the Lucene Exception. It appears Nifi Provenance Repository uses Lucene for indexing & the AlreadyClosedException means the Lucene Core being accessed has been Closed already, owing to FileSystemException with "Too Many Open Files" for the one of the Core Content "/provenance_repo/provenance_repository/lucene-8-index-1647749380623/_vd_Lucene80_0.dvd".

Once AlreadyClosedException is reported, Restarting the Lucene Service would ensure the Cores are initialized afresh. Wish to check if your Team have attempted to increase the OpenFileLimit of the User running the Nifi Process to manage the FileSystemException with "Too Many Open Files" & restart Nifi, which I assume would restart the Lucene Cores as well.

Note that the above answer is provided from Lucene perspective as I am not a Nifi Expert. My only intention to get your team unblocked, if the issue is preventing any Nifi concerns.

Regards, Smarak

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Neil_1992Author

Gold ⭐️

Thanks for your valuable inputs

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MattWho

Titanium ⭐️⭐️⭐️

@Neil_1992
I agree that the first step here is to increase the open file limit for the user that owns your NiFi process.
check your current ulimit by becoming the user the user that owns your NiFi process and executing the "ulimit -a" command.

You can also inspect the /etc/security/limits.comf file.

NiFi can open a very large number of open files. The more FlowFile load, the larger the dataflows, the more concurrent tasks, etc all contribute to open file handles.

I recommend setting the ulimit to a very large value like 999999, restarting NiFi and seeing if your issue persists.

If you found this response assisted with your query, please take a moment to login and click on "Accept as Solution" below this post.

Thank you,

Matt

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Neil_1992Author

Gold ⭐️

Adding below to /etc/security/limits.conf and Restart the nodes twice with adding nodes one after another syncing with primary resolved the Issue

* hard nofile 500000
* soft nofile 500000
root hard nofile 500000
root soft nofile 500000
nifi hard nofile 500000
nifi soft nofile 500000

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maykiwogno

Silver ⭐️⭐️⭐️

Hello,

For my experience, when we restart the nifi, the message disaspeared for one or two days and come back again.

Let check in one week.

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Neil_1992Author

Gold ⭐️

I have found the root cause to be some of the nars of 1.15.3 version , When i removed those and replaced with same nars from 1.13.0 , the issue did not appear , below is the list of nars i removed later replaced with 1.13.0 version

sudo mv /apps/nifi-1.15.3/lib/nifi-distributed-cache-services-nar-1.15.3.nar /apps
sudo mv /apps/nifi-1.15.3/lib/nifi-hadoop-nar-1.15.3.nar /apps/
sudo mv /apps/nifi-1.15.3/lib/nifi-standard-nar-1.15.3.nar /apps

sudo mv /apps/nifi-1.15.3/lib/nifi-scripting-nar-1.15.3.nar /apps/

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maykiwogno

Silver ⭐️⭐️⭐️

Hello @Neil_1992

Why have you replace only these 4 nars ?

Have you got some logs ?

Thanks

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Neil_1992Author

Gold ⭐️

I saw the issues were originating processors related to those nars , i back tracked the processor ids from the logs

Caused by: java.lang.IllegalStateException: failed to create a child event loop
at org.python.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:88)
at org.python.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)
at org.python.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:47)
at org.python.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:59)
at org.python.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:77)
at org.python.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:72)
at org.python.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:59)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.python.core.PyReflectedConstructor.constructProxy(PyReflectedConstructor.java:211)
... 126 common frames omitted
Caused by: org.python.netty.channel.ChannelException: failed to open a new selector
at org.python.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:175)
at org.python.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:149)
at org.python.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:127)
at org.python.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:36)
at org.python.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)
... 137 common frames omitted
Caused by: java.io.IOException: Too many open files
at sun.nio.ch.EPollArrayWrapper.epollCreate(Native Method)
at sun.nio.ch.EPollArrayWrapper.<init>(EPollArrayWrapper.java:130)
at sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:69)
at sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:36)
at org.python.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:173)
... 141 common frames omitted

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maykiwogno

Silver ⭐️⭐️⭐️

Hello @Neil_1992

Can you post the original error in attachment and where I saw the nars issues. I'm trying to find if i got the same issue.

Regards

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Neil_1992Author

Gold ⭐️

You are right @maykiwogno , the issue was resolved in one cluster but coming again in another cluster again and again , PFB logs for that

at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,600 ERROR [Timer-Driven Process Thread-22] o.a.n.p.WriteAheadProvenanceRepository Failed to write events to the Event Store
java.io.FileNotFoundException: /provenance_repo/provenance_repository/toc/5392629.toc (Too many open files)
at java.io.FileOutputStream.open0(Native Method)
at java.io.FileOutputStream.open(FileOutputStream.java:270)
at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
at java.io.FileOutputStream.<init>(FileOutputStream.java:162)
at org.apache.nifi.provenance.toc.StandardTocWriter.<init>(StandardTocWriter.java:63)
at org.apache.nifi.provenance.WriteAheadProvenanceRepository.lambda$initialize$0(WriteAheadProvenanceRepository.java:125)
at org.apache.nifi.provenance.store.WriteAheadStorePartition.tryRollover(WriteAheadStorePartition.java:273)
at org.apache.nifi.provenance.store.WriteAheadStorePartition.addEvents(WriteAheadStorePartition.java:190)
at org.apache.nifi.provenance.store.PartitionedEventStore.addEvents(PartitionedEventStore.java:104)
at org.apache.nifi.provenance.WriteAheadProvenanceRepository.registerEvents(WriteAheadProvenanceRepository.java:186)
at org.apache.nifi.controller.repository.StandardProcessSession.updateProvenanceRepo(StandardProcessSession.java:871)
at org.apache.nifi.controller.repository.StandardProcessSession.commit(StandardProcessSession.java:443)
at org.apache.nifi.controller.repository.StandardProcessSession.commit(StandardProcessSession.java:414)
at org.apache.nifi.controller.repository.StandardProcessSession.commitAsync(StandardProcessSession.java:367)
at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:28)
at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1273)
at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:214)
at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:103)
at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,600 WARN [Cluster Socket Listener] org.apache.nifi.io.socket.SocketListener Failed to communicate with Unknown Host due to java.net.SocketException: Too many open files (Accept failed)
java.net.SocketException: Too many open files (Accept failed)
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409)
at java.net.ServerSocket.implAccept(ServerSocket.java:545)
at sun.security.ssl.SSLServerSocketImpl.accept(SSLServerSocketImpl.java:348)
at org.apache.nifi.io.socket.SocketListener$2.run(SocketListener.java:107)
at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,600 WARN [Cluster Socket Listener] org.apache.nifi.io.socket.SocketListener Failed to communicate with Unknown Host due to java.net.SocketException: Too many open files (Accept failed)
java.net.SocketException: Too many open files (Accept failed)
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409)
at java.net.ServerSocket.implAccept(ServerSocket.java:545)
at sun.security.ssl.SSLServerSocketImpl.accept(SSLServerSocketImpl.java:348)
at org.apache.nifi.io.socket.SocketListener$2.run(SocketListener.java:107)
at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,600 ERROR [Timer-Driven Process Thread-22] o.a.n.p.WriteAheadProvenanceRepository Failed to write events to the Event Store
java.io.FileNotFoundException: /provenance_repo/provenance_repository/toc/5392629.toc (Too many open files)
at java.io.FileOutputStream.open0(Native Method)
at java.io.FileOutputStream.open(FileOutputStream.java:270)
at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
at java.io.FileOutputStream.<init>(FileOutputStream.java:162)
at org.apache.nifi.provenance.toc.StandardTocWriter.<init>(StandardTocWriter.java:63)
at org.apache.nifi.provenance.WriteAheadProvenanceRepository.lambda$initialize$0(WriteAheadProvenanceRepository.java:125)
at org.apache.nifi.provenance.store.WriteAheadStorePartition.tryRollover(WriteAheadStorePartition.java:273)
at org.apache.nifi.provenance.store.WriteAheadStorePartition.addEvents(WriteAheadStorePartition.java:190)
at org.apache.nifi.provenance.store.PartitionedEventStore.addEvents(PartitionedEventStore.java:104)
at org.apache.nifi.provenance.WriteAheadProvenanceRepository.registerEvents(WriteAheadProvenanceRepository.java:186)
at org.apache.nifi.controller.repository.StandardProcessSession.updateProvenanceRepo(StandardProcessSession.java:871)
at org.apache.nifi.controller.repository.StandardProcessSession.commit(StandardProcessSession.java:443)
at org.apache.nifi.controller.repository.StandardProcessSession.commit(StandardProcessSession.java:414)
at org.apache.nifi.controller.repository.StandardProcessSession.commitAsync(StandardProcessSession.java:367)
at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:28)
at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1273)
at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:214)
at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:103)
at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,601 WARN [Cluster Socket Listener] org.apache.nifi.io.socket.SocketListener Failed to communicate with Unknown Host due to java.net.SocketException: Too many open files (Accept failed)
java.net.SocketException: Too many open files (Accept failed)
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409)
at java.net.ServerSocket.implAccept(ServerSocket.java:545)
at sun.security.ssl.SSLServerSocketImpl.accept(SSLServerSocketImpl.java:348)
at org.apache.nifi.io.socket.SocketListener$2.run(SocketListener.java:107)
at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,601 WARN [Cluster Socket Listener] org.apache.nifi.io.socket.SocketListener Failed to communicate with Unknown Host due to java.net.SocketException: Too many open files (Accept failed)
java.net.SocketException: Too many open files (Accept failed)
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409)
at java.net.ServerSocket.implAccept(ServerSocket.java:545)
at sun.security.ssl.SSLServerSocketImpl.accept(SSLServerSocketImpl.java:348)
at org.apache.nifi.io.socket.SocketListener$2.run(SocketListener.java:107)
at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,601 ERROR [Timer-Driven Process Thread-22] o.a.n.p.WriteAheadProvenanceRepository Failed to write events to the Event Store
java.io.FileNotFoundException: /provenance_repo/provenance_repository/toc/5392629.toc (Too many open files)
at java.io.FileOutputStream.open0(Native Method)
at java.io.FileOutputStream.open(FileOutputStream.java:270)
at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
at java.io.FileOutputStream.<init>(FileOutputStream.java:162)
at org.apache.nifi.provenance.toc.StandardTocWriter.<init>(StandardTocWriter.java:63)
at org.apache.nifi.provenance.WriteAheadProvenanceRepository.lambda$initialize$0(WriteAheadProvenanceRepository.java:125)
at org.apache.nifi.provenance.store.WriteAheadStorePartition.tryRollover(WriteAheadStorePartition.java:273)
at org.apache.nifi.provenance.store.WriteAheadStorePartition.addEvents(WriteAheadStorePartition.java:190)
at org.apache.nifi.provenance.store.PartitionedEventStore.addEvents(PartitionedEventStore.java:104)
at org.apache.nifi.provenance.WriteAheadProvenanceRepository.registerEvents(WriteAheadProvenanceRepository.java:186)
at org.apache.nifi.controller.repository.StandardProcessSession.updateProvenanceRepo(StandardProcessSession.java:871)
at org.apache.nifi.controller.repository.StandardProcessSession.commit(StandardProcessSession.java:443)
at org.apache.nifi.controller.repository.StandardProcessSession.commit(StandardProcessSession.java:414)
at org.apache.nifi.controller.repository.StandardProcessSession.commitAsync(StandardProcessSession.java:367)
at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:28)
at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1273)
at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:214)
at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:103)
at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,601 WARN [Cluster Socket Listener] org.apache.nifi.io.socket.SocketListener Failed to communicate with Unknown Host due to java.net.SocketException: Too many open files (Accept failed)
java.net.SocketException: Too many open files (Accept failed)
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409)
at java.net.ServerSocket.implAccept(ServerSocket.java:545)
at sun.security.ssl.SSLServerSocketImpl.accept(SSLServerSocketImpl.java:348)
at org.apache.nifi.io.socket.SocketListener$2.run(SocketListener.java:107)
at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,601 WARN [Cluster Socket Listener] org.apache.nifi.io.socket.SocketListener Failed to communicate with Unknown Host due to java.net.SocketException: Too many open files (Accept failed)
java.net.SocketException: Too many open files (Accept failed)
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409)
at java.net.ServerSocket.implAccept(ServerSocket.java:545)
at sun.security.ssl.SSLServerSocketImpl.accept(SSLServerSocketImpl.java:348)
at org.apache.nifi.io.socket.SocketListener$2.run(SocketListener.java:107)
at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,601 WARN [Cluster Socket Listener] org.apache.nifi.io.socket.SocketListener Failed to communicate with Unknown Host due to java.net.SocketException: Too many open files (Accept failed)
java.net.SocketException: Too many open files (Accept failed)
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409)
at java.net.ServerSocket.implAccept(ServerSocket.java:545)
at sun.security.ssl.SSLServerSocketImpl.accept(SSLServerSocketImpl.java:348)
at org.apache.nifi.io.socket.SocketListener$2.run(SocketListener.java:107)
at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,601 ERROR [Timer-Driven Process Thread-22] o.a.n.p.WriteAheadProvenanceRepository Failed to write events to the Event Store
java.io.FileNotFoundException: /provenance_repo/provenance_repository/toc/5392629.toc (Too many open files)
at java.io.FileOutputStream.open0(Native Method)
at java.io.FileOutputStream.open(FileOutputStream.java:270)
at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
at java.io.FileOutputStream.<init>(FileOutputStream.java:162)
at org.apache.nifi.provenance.toc.StandardTocWriter.<init>(StandardTocWriter.java:63)
at org.apache.nifi.provenance.WriteAheadProvenanceRepository.lambda$initialize$0(WriteAheadProvenanceRepository.java:125)
at org.apache.nifi.provenance.store.WriteAheadStorePartition.tryRollover(WriteAheadStorePartition.java:273)
at org.apache.nifi.provenance.store.WriteAheadStorePartition.addEvents(WriteAheadStorePartition.java:190)
at org.apache.nifi.provenance.store.PartitionedEventStore.addEvents(PartitionedEventStore.java:104)
at org.apache.nifi.provenance.WriteAheadProvenanceRepository.registerEvents(WriteAheadProvenanceRepository.java:186)
at org.apache.nifi.controller.repository.StandardProcessSession.updateProvenanceRepo(StandardProcessSession.java:871)
at org.apache.nifi.controller.repository.StandardProcessSession.commit(StandardProcessSession.java:443)
at org.apache.nifi.controller.repository.StandardProcessSession.commit(StandardProcessSession.java:414)
at org.apache.nifi.controller.repository.StandardProcessSession.commitAsync(StandardProcessSession.java:367)
at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:28)
at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1273)
at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:214)
at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:103)
at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,601 WARN [Cluster Socket Listener] org.apache.nifi.io.socket.SocketListener Failed to communicate with Unknown Host due to java.net.SocketException: Too many open files (Accept failed)
java.net.SocketException: Too many open files (Accept failed)
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409)
at java.net.ServerSocket.implAccept(ServerSocket.java:545)
at sun.security.ssl.SSLServerSocketImpl.accept(SSLServerSocketImpl.java:348)
at org.apache.nifi.io.socket.SocketListener$2.run(SocketListener.java:107)
at java.lang.Thread.run(Thread.java:748)
2022-04-20 05:22:19,601 WARN [Cluster Socket Listener] org.apache.nifi.io.socket.SocketListener Failed to communicate with Unknown Host due to java.net.SocketException: Too many open files (Accept failed)
java.net.SocketException: Too many open files (Accept failed)
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409)
at java.net.ServerSocket.implAccept(ServerSocket.java:545)
at sun.security.ssl.SSLServerSocketImpl.accept(SSLServerSocketImpl.java:348)
at org.apache.nifi.io.socket.SocketListener$2.run(SocketListener.java:107)
at java.lang.Thread.run(Thread.java:748)

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Neil_1992AuthorAnswer

Gold ⭐️

Hi All,

we need to increase open file limit for nifi as a service not user , so add the below line in your

nifi.service file and restart the server , it should resolve this issue

LimitNOFILE=999999

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Scorpy257

Silver ⭐️⭐️

Sorry @Neil_1992 where could I find nifi.service file, to add this property ?

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