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From Karl Wright <daddy...@gmail.com>
Subject RE: [jira] [Reopened] (CONNECTORS-1116) "Too many open files" IO exception from Rest API
Date Thu, 27 Nov 2014 20:33:34 GMT
Hmm, it may be because this is happening in a transaction.  I will
have to experiment further.

Sent from my Windows Phone

-----Original Message-----
From: Adrian Conlon (JIRA)
Sent: 11/27/2014 12:12 PM
To: dev@manifoldcf.apache.org
Subject: [jira] [Reopened] (CONNECTORS-1116) "Too many open files" IO
exception from Rest API


     [ https://issues.apache.org/jira/browse/CONNECTORS-1116?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Adrian Conlon reopened CONNECTORS-1116:
 ---------------------------------------

Applying the patch still leads to a similar callstack from tomcat.

> "Too many open files" IO exception from Rest API
 > ------------------------------------------------
 >
 >                 Key: CONNECTORS-1116
 >                 URL: https://issues.apache.org/jira/browse/CONNECTORS-1116
 >             Project: ManifoldCF
 >          Issue Type: Bug
 >          Components: API
 >    Affects Versions: ManifoldCF 1.7.2
 >         Environment: Ubuntu Linux, Tomcat, Zookeeper
 >            Reporter: Adrian Conlon
 >            Assignee: Karl Wright
 >             Fix For: ManifoldCF 1.8, ManifoldCF 2.0
 >
 >         Attachments: CONNECTORS-1116.patch
 >
 >
 > Using the REST API to get a list of all the job definitions.
 > Using lsof, I can see that the total number of open files jumps
from around 160 to 4500 as the call is made.
 > Also, I should note that there are around 4000 jobs under MCF control.
 > Exception below:
 > ERROR 2014-11-26 12:46:07,042 (http-bio-8080-exec-9) - Zookeeper
initialization error: Couldn't instantiate
org.apache.zookeeper.ClientCnxnSocketNIO
 > org.apache.manifoldcf.core.interfaces.ManifoldCFException:
Zookeeper initialization error: Couldn't instantiate
org.apache.zookeeper.ClientCnxnSocketNIO
 >         at org.apache.manifoldcf.core.lockmanager.ZooKeeperConnection.createSession(ZooKeeperConnection.java:82)
 >         at org.apache.manifoldcf.core.lockmanager.ZooKeeperConnection.<init>(ZooKeeperConnection.java:66)
 >         at org.apache.manifoldcf.core.lockmanager.ZooKeeperConnectionPool.grab(ZooKeeperConnectionPool.java:48)
 >         at org.apache.manifoldcf.core.lockmanager.ZooKeeperLockObject.obtainGlobalReadLock(ZooKeeperLockObject.java:190)
 >         at org.apache.manifoldcf.core.lockmanager.LockObject.enterReadLock(LockObject.java:310)
 >         at org.apache.manifoldcf.core.lockmanager.LockGate.enterReadLock(LockGate.java:261)
 >         at org.apache.manifoldcf.core.lockmanager.BaseLockManager.enter(BaseLockManager.java:1522)
 >         at org.apache.manifoldcf.core.lockmanager.BaseLockManager.enterLocks(BaseLockManager.java:803)
 >         at org.apache.manifoldcf.core.cachemanager.CacheManager.enterCache(CacheManager.java:299)
 >         at org.apache.manifoldcf.core.cachemanager.CacheManager.findObjectsAndExecute(CacheManager.java:100)
 >         at org.apache.manifoldcf.crawler.jobs.Jobs.loadMultiple(Jobs.java:926)
 >         at org.apache.manifoldcf.crawler.jobs.Jobs.getAll(Jobs.java:774)
 >         at org.apache.manifoldcf.crawler.jobs.JobManager.getAllJobs(JobManager.java:760)
 >         at org.apache.manifoldcf.crawler.system.ManifoldCF.apiReadJobs(ManifoldCF.java:1299)
 >         at org.apache.manifoldcf.crawler.system.ManifoldCF.executeReadCommand(ManifoldCF.java:2919)
 >         at org.apache.manifoldcf.apiservlet.APIServlet.executeRead(APIServlet.java:232)
 >         at org.apache.manifoldcf.apiservlet.APIServlet.doGet(APIServlet.java:78)
 >         at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
 >         at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
 >         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
 >         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
 >         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
 >         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
 >         at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
 >         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
 >         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
 >         at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
 >         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
 >         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
 >         at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
 >         at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
 >         at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
 >         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
 >         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
 >         at java.lang.Thread.run(Thread.java:745)
 > Caused by: java.io.IOException: Couldn't instantiate
org.apache.zookeeper.ClientCnxnSocketNIO
 >         at org.apache.zookeeper.ZooKeeper.getClientCnxnSocket(ZooKeeper.java:1778)
 >         at org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:447)
 >         at org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:380)
 >         at org.apache.manifoldcf.core.lockmanager.ZooKeeperConnection.createSession(ZooKeeperConnection.java:74)
 >         ... 34 more
 > Caused by: java.io.IOException: Too many open files
 >         at sun.nio.ch.IOUtil.makePipe(Native Method)
 >         at sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:65)
 >         at sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:36)
 >         at java.nio.channels.Selector.open(Selector.java:227)
 >         at org.apache.zookeeper.ClientCnxnSocketNIO.<init>(ClientCnxnSocketNIO.java:43)
 >         at sun.reflect.GeneratedConstructorAccessor27.newInstance(Unknown
Source)
 >         at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
 >         at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
 >         at java.lang.Class.newInstance(Class.java:374)
 >         at org.apache.zookeeper.ZooKeeper.getClientCnxnSocket(ZooKeeper.java:1775)
 >         ... 37 more



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