Java Memory Error Unable To Create New Native Thread
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Unable To Create New Native Thread Java
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Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping spark java.lang.outofmemoryerror: unable to create new native thread each other. Join them; it only takes a minute: Sign up “java.lang.OutOfMemoryError : unable to create new native Thread” up vote 62 down vote favorite 17 We are getting "java.lang.OutOfMemoryError : unable to create new native Thread" on 8GB RAM VM after 32k threads (ps -eLF| grep -c java) However, "top" and "free -m" shows 50% free java.lang.outofmemoryerror: unable to create new native thread centos memory available. JDk is 64 bit and tried with both HotSpot and JRockit.Server has Linux 2.6.18 We also tried OS stack size (ulimit -s) tweaking and max process(ulimit -u) limits, limit.conf increase but all in vain. Also we tried almost all possible of heap size combinations, keeping it low, high etc. The script we use to run application is /opt/jrockit-jdk1.6/bin/java -Xms512m -Xmx512m -Xss128k -jar JavaNatSimulator.jar /opt/tools/jnatclients/natSimulator.properties Thanks for the reply. We have tried editing /etc/security/limits.conf and ulimit but still that same [root@jboss02 ~]# ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 72192 max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) unlimited open files (-n) 65535 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 72192 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited java out-of-memory share|improve this que
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4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Java Memory error: unable to create new native thread up vote 22 down vote favorite 3 I get http://stackoverflow.com/questions/16789288/java-lang-outofmemoryerror-unable-to-create-new-native-thread this error on my UNIX server, when running my java server: Exception in thread "Thread-0" java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method) at java.lang.Thread.start(Thread.java:640) at [... where ever I launch a new Thread ...] It happens everytime I have about 600 threads running. I have set up this variable on the server: $> ulimit -s 128 What looks strange to me is the result of this command, which I ran http://stackoverflow.com/questions/8203156/java-memory-error-unable-to-create-new-native-thread when the bug occured the last time: $> free -m total used free shared buffers cached Mem: 2048 338 1709 0 0 0 -/+ buffers/cache: 338 1709 Swap: 0 0 0 I launch my java server like this: $> /usr/bin/java -server -Xss128k -Xmx500m -jar /path/to/myJar.jar My debian version: $> cat /etc/debian_version 5.0.8 My java version: $> java -version java version "1.6.0_26" Java(TM) SE Runtime Environment (build 1.6.0_26-b03) Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02, mixed mode) My question: I have read on Internet that my program should handle something like 5000 threads or so. So what is going on, and how to fix please ? Edit: this is the output of ulimit -a when I open a shell: core file size (blocks, -c) unlimited data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 794624 max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) unlimited open files (-n) 100000 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 794624 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited I run the script as a daemon from init.d, and this is what i run: DAEMON
Guides Zones | Agile Big Data Cloud Database DevOps Integration IoT Java Mobile Performance Web Dev Let's be friends: OutOfMemoryError: Unable to Create New Native Thread – Problem Demystified by Pierre - Hugues Charbonneau · Oct. 04, 12 · Java Zone Like (0) Comment (1) https://dzone.com/articles/outofmemoryerror-unable-create Save Tweet {{ articles[0].views | formatCount}} Views Edit Delete {{ articles[0].isLocked ? 'Enable' : 'Disable' https://support.cloudbees.com/hc/en-us/articles/204231510-Memory-problem-unable-to-create-new-native-thread- }} comments {{ articles[0].isLimited ? 'Remove comment limits' : 'Enable moderated comments' }} Join the DZone community and get the full member experience. Join For Free What every Java engineer should know about microservices: Reactive Microservices Architecture. Brought to you in partnership with Lightbend. As you may have seen from my previous tutorials and case studies, Java Heap Space OutOfMemoryError problems can be unable to complex to pinpoint and resolve. One of the common problems I have observed from Java EE production systems is OutOfMemoryError: unable to create new native thread; error thrown when the HotSpot JVM is unable to further create a new Java thread. This article will revisit this HotSpot VM error and provide you with recommendations and resolution strategies. If you are not familiar with the HotSpot JVM, I first recommend that you look at a high level unable to create view of its internal HotSpot JVM memory spaces. This knowledge is important in order for you to understand OutOfMemoryError problems related to the native (C-Heap) memory space. OutOfMemoryError: unable to create new native thread – what is it? Let’s start with a basic explanation. This HotSpot JVM error is thrown when the internal JVM native code is unable to create a new Java thread. More precisely, it means that the JVM native code was unable to create a new “native” thread from the OS (Solaris, Linux, MAC, Windows...). We can clearly see this logic from the OpenJDK 1.6 and 1.7 implementations as per below: Unfortunately at this point you won’t get more detail than this error, with no indication of why the JVM is unable to create a new thread from the OS… HotSpot JVM: 32-bit or 64-bit? Before you go any further in the analysis, one fundamental fact that you must determine from your Java or Java EE environment is which version of HotSpot VM you are using e.g. 32-bit or 64-bit. Why is it so important? What you will learn shortly is that this JVM problem is very often related to native memory depletion; either at the JVM process or OS level. For now please keep in mind that: A 32-bit JVM process is in theory allowed to grow up to 4 GB (even muc
OpenSUSE Red Hat/Fedora/CentOS Ubuntu/Debian Windows Release Notes | Past Releases CloudBees Jenkins Operations Center 2.7.19.1 Docker OpenSUSE Red Hat/Fedora/CentOS Ubuntu/Debian Windows Release Notes | Past Releases Want security updates only? CloudBees uses continuous delivery to create rolling releases that are the most current and highest quality version of Jenkins available. However, if you only need security updates, and no new features, we offer fixed releases. Get fixed releases Fixed Releases Locked to 2.7 core with limited updates for critical fixes. CloudBees Jenkins Enterprise 2.7.19.0.1 Docker OpenSUSE Red Hat/Fedora/CentOS Ubuntu/Debian Windows Release Notes | Past Releases CloudBees Jenkins Operations Center 2.7.19.0.1 Docker OpenSUSE Red Hat/Fedora/CentOS Ubuntu/Debian Windows Release Notes | Past Releases CloudBees Network Documentation Knowledgebase Training Support Sign in My activities Submit a request CloudBees Support CloudBees Platform Help CloudBees Jenkins Enterprise Memory problem: 'unable to create new native thread' April 15, 2016 18:01 Issue You see this stacktrace in jenkins.log: Caused by: java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method) at java.lang.Thread.start(Thread.java:714) at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:949) at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1371) Environment Jenkins, CloudBees Jenkins Enterprise, CloudBees Jenkins Operations Center Linux, Solaris Resolution Great chances are you are hitting one of the following system OS limit: number of running user processes number of opened files To see the current limits of your system, run ulimit -a on the command-line with the user running Jenkins (usually jenkins). You should see something like this: core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 30 file size (blocks, -f) unlimited pending signals (-i) 30654 max locked memory (kbytes, -l) unlimited max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 99 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 1024 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited T