We have had this error twice since yesterday:
[2018-11-02 09:29:35,884] [HTTP-841] WARN org.eclipse.jetty.io.ManagedSelector : Accept failed for channel java.nio.channels.SocketChannel[closed]
java.io.IOException: Too many open files
at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422)
at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)
at org.eclipse.jetty.io.ManagedSelector.processAccept(ManagedSelector.java:393)
at org.eclipse.jetty.io.ManagedSelector.access$1000(ManagedSelector.java:56)
at org.eclipse.jetty.io.ManagedSelector$SelectorProducer.processSelected(ManagedSelector.java:295)
at org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:181)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:249)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
at java.lang.Thread.run(Thread.java:748)
[2018-11-02 09:29:35,889] [HTTP-939] WARN org.eclipse.jetty.server.HttpChannel : //git.audiokinetic.inte/plugins/lfs/content/default/dfc04334bcade529dfc3d07a90369213792ce7ed3580dd19f042a798b5080ddc
java.nio.file.FileSystemException: /home/software/gerrit/data/lfs/df/c0/dfc04334bcade529dfc3d07a90369213792ce7ed3580dd19f042a798b5080ddc: 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.newFileChannel(UnixFileSystemProvider.java:177)
at java.nio.channels.FileChannel.open(FileChannel.java:287)
at java.nio.channels.FileChannel.open(FileChannel.java:335)
at org.eclipse.jgit.lfs.server.fs.FileLfsRepository.getReadChannel(FileLfsRepository.java:145)
at org.eclipse.jgit.lfs.server.fs.ObjectDownloadListener.<init>(ObjectDownloadListener.java:101)
at com.googlesource.gerrit.plugins.lfs.fs.LfsFsContentServlet.getObject(LfsFsContentServlet.java:141)
at com.googlesource.gerrit.plugins.lfs.fs.LfsFsContentServlet.doGet(LfsFsContentServlet.java:82)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at com.google.inject.servlet.ServletDefinition.doServiceImpl(ServletDefinition.java:290)
at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:280)
at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:184)
at com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:89)
at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:120)
at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:133)
at com.google.gerrit.httpd.plugins.HttpPluginServlet.service(HttpPluginServlet.java:250)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at com.google.inject.servlet.ServletDefinition.doServiceImpl(ServletDefinition.java:290)
at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:280)
at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:184)
at com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:89)
at com.google.gerrit.httpd.raw.StaticModule$PolyGerritFilter.doFilter(StaticModule.java:451)
at com.google.gerrit.httpd.GetUserFilter.doFilter(GetUserFilter.java:100)
at com.google.gerrit.httpd.RunAsFilter.doFilter(RunAsFilter.java:122)
at com.google.gwtexpui.server.CacheControlFilter.doFilter(CacheControlFilter.java:69)
at com.google.gerrit.httpd.AllRequestFilter$FilterProxy$1.doFilter(AllRequestFilter.java:133)
at com.google.gerrit.httpd.AllRequestFilter$FilterProxy.doFilter(AllRequestFilter.java:135)
at com.google.gerrit.httpd.RequestMetricsFilter.doFilter(RequestMetricsFilter.java:57)
at com.google.gerrit.httpd.RequestContextFilter.doFilter(RequestContextFilter.java:69)
at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:120)
at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:133)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1759)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:224)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.RequestLogHandler.handle(RequestLogHandler.java:56)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
at org.eclipse.jetty.server.Server.handle(Server.java:534)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:108)
at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
at java.lang.Thread.run(Thread.java:748)
[2018-11-02 09:29:35,890] [HTTP-841] WARN org.eclipse.jetty.io.ManagedSelector : Accept failed for channel null
java.io.IOException: Too many open files
at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422)
at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)
at org.eclipse.jetty.io.ManagedSelector.processAccept(ManagedSelector.java:393)
at org.eclipse.jetty.io.ManagedSelector.access$1000(ManagedSelector.java:56)
at org.eclipse.jetty.io.ManagedSelector$SelectorProducer.processSelected(ManagedSelector.java:295)
at org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:181)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:249)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
at java.lang.Thread.run(Thread.java:748)