All Questions
24 questions
0votes
0answers
58views
Linux Server swap memory problem
I have the same problem on all servers running Java processes. I have lots of available memory. But my swap is full of Java-related pages. But the system never cleans its swap, Java pages stay there &...
2votes
1answer
627views
When SIGTERM is received by a process, what happens to its children?
I am wondering what happens when a process receives SIGTERM and it has children spawned (e.g. JVM that has /bin/sh commands running). Is there some sort of automatism or does the parent simply exit ...
- 143
3votes
0answers
517views
Linux: Is there a limit for the number of fork() calls one process goup can issue? (Not per user!)
We have a strange problem on a SuSE Linux Enterprise Server 12.5 system (kernel 4.12.14-122.60), which is the only KVM guest in a simliar KVM host: One service started by systemd starts one program -&...
0votes
1answer
72views
Can a process share unused memory with others?
I want to run about 200 processes with my experiments. Every of them really needs less than a GB: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 24688 rinkman 20 0 ...
- 103
0votes
2answers
3kviews
How to check if a java process in unix is killed?
I have a java application on Unix. This application unexpectedly stops. I am looking for what is the problem. How can I tell in a java process started on Unix, if this process is being killed? (with ...
1vote
1answer
191views
Keep reverse SSH tunnel opened via java application when the app is stopped
As discussed in the following StackOverflow question I am creating a Java program that starts a reverse SSH tunnel. I have created a script /root/reverse.sh that starts a subshell and creates a ...
- 111
0votes
1answer
1kviews
Kill only one Java process by grep
I want to kill this process: root 11870 30.1 21.9 2358848 220980 pts/0 Tl 07:51 0:24 java -jar /opt/bonansa/bonansa.jar If I do : root@localhost:/usr/local/bin# ps -A |grep java 11870 ...
0votes
1answer
295views
JVM memory + dose heap size Xmx values have impact on consuming memory
we have linux redhat machines with service ( service is based on java ) for now service consume 1.5G memory , and the heap size set to Xmx2G let say we increase the heap size to Xmx10G dose this ...
- 13.9k
0votes
1answer
793views
Linux start screen and run a java program and detach it?
I have the following script that should do the following: Stop screen "server" if exists Start screen "server" Run a java program and detach screen. However, when I firstly run the script, the program ...
0votes
1answer
877views
Piping PID into jstack
I've written a command line that effectively extracts the highest CPU java PID thread process from top -H (example code): top -H -n 1 | grep "java" | head -n 1 | cut -d' ' -f1 I want to inspect the ...
3votes
3answers
7kviews
How to get pid number and folder where it works
How I can get PID number and folder where it works? If I run 2 same programs in different folders: /var/www/public_html/first_folder/test.jar <i>(it runs all the time)</i> /var/www/...
- 41
0votes
0answers
551views
<pidof> Command not showing all Java processes
I noticed that the command in my case, is not listing all Java processes. If I run pidof java I get one single pid as a response. On the other hand, if I run ps aux | grep [j]ava I get a three ...
- 315
0votes
1answer
482views
kill a java process after it was running for one hour
I need a script that will murder java processes that have been on for more than one hour. So I am trying this timeout -k 10s nohup cpulimit -l 40 -- java -jar file.jar Any idea why this isn't ...
- 209
1vote
2answers
2kviews
How to start the killed java process with its PID?
How to start the killed java process with its PID in Linux?
- 11
3votes
2answers
5kviews
foolproof way to detect if java process is running
I have a java process that runs continually that sometimes, for reasons I have yet to fully debug, craps out. So, I also have a cron job that looks for the process every 5 minutes and if it finds the ...
- 133
