I want to get heap dump of jvm running on my remote linux prod server . The new jvisualvm 1.3.5 has the link to get heap dump but when I try to get heap dump I get the error telling cannot take heap dump from the remote server for pid...
Please advice me how to get heap dump for my remote jvm.
Related
when I deploy a Mule API and after deployment, I do some changes and save it then my API gets redeploy.
during redeployment, I am getting the below error in the console that stops the deployment.
java.lang.OutOfMemoryError: Metaspace
Dumping heap to java_pid19656.hprof ...
Heap dump file created [197920637 bytes in 0.811 secs]
#
# java.lang.OutOfMemoryError: Metaspace
# -XX:OnOutOfMemoryError="taskkill /F /PID %p"
# Executing "taskkill /F /PID 19656"...
JVM exited unexpectedly.
Automatic JVM Restarts disabled. Shutting down.
<-- Wrapper Stopped
anyone can help me to fix this issue?
Thanks
Probably you are having a known issue related to redeployments that cause the metaspace are to get exhausted. It is recommended to use the latest version of Mule and the latest version of every connector used in your applications to mitigate that issue.
Also ensure that the MetaspaceSize is half of MaxMetaspaceSize. You can increase MaxMetaspaceSize if you feel you are deploying lots of classes or applications, but keep the proportion mentioned.
wrapper.java.additional.7=-XX:MetaspaceSize=128m
wrapper.java.additional.8=-XX:MaxMetaspaceSize=256m
I'm using GraphDb Free 8.6.1 in research project, I'm running it with default configuration on linux server having 4GB memory in total.
Currently, we execute quite many CRUD operations in tripplestore.
GraphDB throwed exception in console:
java.lang.OutOfMemoryError: Java heap space
-XX:OnOutOfMemoryError="kill -9 %p"
Executing /bin/sh -c "kill -9 1411"...
Looking into process, GraphDB runs with parameter XX:MaxDirectMemorySize=128G
I was not able to changed, even with ./graph -Xmx3g, process is still running with XX:MaxDirectMemorySize=128G.
I've tried to configure ./grapdh parameter, setting the GDB_HEAP_SIZE=3072m, now process runs with additional -Xms3072m -Xmx3072m parameters, but remains XX:MaxDirectMemorySize=128G.
After update to GDB_HEAP_SIZE=3072m, repository went down again without .hprof file, no exception, nothing suspicious in logs. The following line was flushed into console: Java HotSpot(TM) 64-Bit Server VM warning:
Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00007f5b4b6d0000, 65536, 1) failed; error='Cannot allocate memory' (errno=12)
Please, can you help me to properly configure GraphDB tripplestore to get rid of the Heap Space exceptions?
Thank you.
By default, the value of the -XX:MaxDirectMemorySize (off heap memory) parameter in the JVM is equal to the -XMx (on heap memory). For very large repositories the size of the off heap memory may become insufficient so the GraphDB developers made this parameter 128GB or unlimited.
I suspect that your actual issue is actually allocating too much on heap memory, which leaves no space for the off heap in the RAM. When the database tries to allocate off heap RAM you hit this low OS-level error 'Cannot allocate memory'.
You have two options in solving this problem:
Increase the RAM of the server to 8GB and keep the same configuration - this would allow the 8 GB RAM to be distributed: 2GB (OS) + 3GB (on heap) + 3GB (off heap)
Decrease the -Xmx value to 2GB so the 4GB RAM will be distributed: 1GB (OS) + 2GB (on heap) + 1GB (off heap)
To get a good approximation how much RAM GraphDB needs please check the hardware sizing page:
http://graphdb.ontotext.com/documentation/8.6/free/requirements.html
i try to star rockerMQ broker,but i got the error message:
There is insufficient memory for the Java Runtime Environment to continue.
Native memory allocation (mmap) failed to map 8589934592 bytes for committing reserved memory.
An error report file with more information is saved as:
/usr/local/soft/rocketMQ/incubator-rocketmq/distribution/target/apache-rocketmq/hs_err_pid6034.log
Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000005c0000000, 8589934592, 0) failed; error='Cannot allocate memory' (errno=12)
and i got something from the error log file about message of memory:
Memory: 4k page, physical 4089840k(551832k free), swap 2621432k(2621432k free)
vm_info: Java HotSpot(TM) 64-Bit Server VM (25.144-b01) for linux-amd64 JRE (1.8.0_144-b01), built on Jul 21 2017 21:57:33 by "java_re" with gcc 4.3.0 20080428 (Red Hat 4.3.0-8)
how can i let the rockerMQ broker working for me
You can reduce the JVM heap size.
Open the distribution/bin/runbroker.sh file of your project and change the following line
JAVA_OPT="${JAVA_OPT} -server -Xms8g -Xmx8g -Xmn4g"
as
JAVA_OPT="${JAVA_OPT} -server -Xms4g -Xmx4g -Xmn2g"
now broker will only generate a 4G heap .I hope it will solve your problem.Now you can try to build and run.
Try modifying the start shell scripts to make a smaller JVM heap size in your dev/test env
I'm trying to create a minecraft server and the following error:
E:\Documentos\Minecraft>java -Xms1G -Xmx2G -jar server.jar -o false
Error occurred during initialization of VM Could not reserve enough
space for 2097152KB object heap E:\Documentos\Minecraft>PAUSE
Pressione qualquer tecla para continuar. . .
Can someone help me?
Your error message states
"Error occurred during initialization of VM Could not reserve enough space for 2097152KB object heap"
You don't have enough memory to run your server. Try upgrading your storage capacity.
The computer you are running this on does not have enough memory to allocate 1 gigabyte to a process. You will need to get a computer with more RAM to run a server.
You are using more RAM to the server that you have, in run.bat change:
java -Xms1G -Xmx2G -jar server.jar -o false
to
java -Xms1G -Xmx1G -jar server.jar
In recent versions "-o" don't works more.
I want to increase the heap size of my Glassfish. For that, I know that I can go up to 4GB:
java -Xmx4000M -version
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03-384-10M3425)
Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02-384, mixed mode)
I tried to set in domain.xml file the -Xmx to 2GB:
<jvm-options>-Xmx2000m</jvm-options>
But I am getting the following error:
asadmin> start-domain
Waiting for ... to start .Error starting domain ...
The server exited prematurely with exit code 1.
Before it died, it produced the following output:
Error occurred during initialization of VM
The size of the object heap + VM data exceeds the maximum representable size
launchctl bsexec failed: Inappropriate ioctl for device
Launching the command with -v option gives this:
12 oct. 2011 11:46:34 com.sun.enterprise.admin.launcher.GFLauncherLogger info
INFO: JVM invocation command line:
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java
-XX:+UnlockDiagnosticVMOptions
-XX:MaxPermSize=512m
-XX:NewRatio=2
-XX:+CMSClassUnloadingEnabled
-Xmx2000m
-Xms1000m
...
12 oct. 2011 11:46:35 com.sun.enterprise.admin.launcher.GFLauncherLogger info
INFO: Successfully launched in 45 msec.
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
Command start-domain failed.
I found the problem. For some reasons which I do not understand, the "-d32" argument was passed in the command, asking to start in 32 bits mode. When adding
<jvm-options>-d64</jvm-options>
to the domain.xml file, glassfish starts. Please note that this option is not present by default in the file.
you must be using a different Java install when doing the "-version" and from within GlassFish. I can reproduce the same error with the default "java" in Mac OS' path but not when using an absolute path :
% /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java -Xmx2300m -version
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03-383-11A511)
Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02-383, mixed mode)
% java -Xmx2300m -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
Could it be that you don't have enough disk space on your system? Reserving 4GB of RAM may require MAC OS to expand swap space, and you may not have the disk space to do this. Unfortunately, this has burned me before :-/