Java crash log file

How to set location of jvm crash log files

I need to configure where the jvm crash logs are created. I like the name they have (hs_err_pid.log) but I want them created in an specific folder.

In here you can see that you can use the

param to set the FILE created, but if you set this to a folder, so the file is created in that folder with the original naming convention, it does not work, it is ignored.

I have been testing this by crashing jvm 1.6 from this questions, using this: PathDasher dasher = new PathDasher(null) ;

Anybody knows a way to achieve this?

The parameter does not allow for environment variables, but you can use environment variables in a launcher script (e.g. .sh or .bat) and the OS will do the substitution. However, this will use the value of the environment variable at the time of starting the JVM and not when the file is written later. Furthermore, environment variables do not work when setting Run properties in Eclipse.

The JVM will not create intermediate directories saving the crash dump. The crash dump will be saved at the default location if the specified folder does not exist.

in command prompt. Here, Crash is my java file.

Where do I find the core dump in ubuntu 16.04LTS?, In Ubuntu the core dumps are handled by Apport and can be located in /var/crash/. But it is disabled by default in stable releases. To enable Apport, …

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Where is Xserver log file located?

My Ubuntu 10.10 sometimes totally freezes. I suppose that it is somehow related to my graphic card and would like to check Xserver log. Where is this file located ?

Where most of log files located: /var/log/

Log filename: Xorg.0.log Xorg.1.log etc.

You can check out the log files:

System menu > Choose Administration > System Log

Applications > System Tool > Log File Viewer

/var/log/ as mentioned, or ~/.local/share/xorg/ :

If a problem occurs, view the log stored in either /var/log/ or, for the rootless X default since v1.16, in ~/.local/share/xorg/ .

— ArchWiki

Note that ~ is a home directory of an user who starts xserver. This user could be gdm3 for example and in such case you will find logs at /var/lib/gdm3/.local/share/xorg .

When an application crash without output an error, is, crash files go into /var/log/crashes/ for use with apport to report bugs. You can extract a core dump with apport-unpack, put that core dump through gdb, and …

When an application crash without output an error, is there a log that i can check?

Sometimes it happen that some application crash without give no output error ( conky in my case, probably is one of my configuration that is incorrect).

Is there somewhere a error log that I can check to understand why it is crashed?

Depends on the application. Different applications have different logging systems; there’s no one central log that contains all the output from all the programs that run on your system.

That being said, a lot of programs do put their log files in the directory /var/log . The file /var/log/syslog (or maybe /var/log/messages ), in particular, contains output from the «system logger», which is a service made available by the system that programs can use (if they choose to) for logging. But not all programs use it. Mostly, you’ll find messages from low-level system services in that file, not the graphical applications you probably use normally.

You may want to read more about the locations of standard log files.

crash files go into /var/log/crashes/ for use with apport to report bugs. You can extract a core dump with apport-unpack , put that core dump through gdb, and find out what’s causing the program to crash.

This is all assuming you’re a programmer. If you’re not. well, you can’t fix the crash anyway!

For conky it could also be that there are entries in $HOME/.xsession-errors .

Some applications have flags that can be used to turn on debugging, such as -d, -D, —debug, etc. Check the application’s man page ( man [my-app] ) or run the app with the -h flag to see if it has such an option.

Many GUI apps write into $HOME/.xsession-errors so that’s a good place to check for output.

maco’s right that apport is probably the most sure-fire way to get good debug info. Sometimes it doesn’t capture the crash, though.

If all else fails, you can also force the info out of it by running the app in gdb. It’d be something like:

. do whatever is needed to get it to crash .

If you go the gdb route you’ll also want to install symbols, as mentioned previously. See https://wiki.ubuntu.com/DebuggingProgramCrash for handholding advice.

Debugging — Where do I find core dump files, and how do, # set max core dump file size to unlimited ulimit -c unlimited # verify it is now set to «unlimited» ulimit -c That’s it! Now, run your program and if it …

Источник

JVM crash log file

If the JVM is crashing, it should leave the hs_err_pidXXXX.log in the directory it’s run from. If you want to send it somewhere else, you can run java with -XX:ErrorFile=/path/to/file.

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user111196

Updated on September 18, 2022

Comments

I have a java application running as a daemon. Suddenly it stop working so I would like to know if jvm crash and where will the log file be dump? It can be either fedora or centos?

I ran this command find / -name hs_err found no file. So that means not jvm crash event is it or must I set it some where first?

Unless you’re telling java not to write that file, that basically means that yes, JVM is not crashing. But that file will only be created if the JVM crashes — if your program has an uncaught error or otherwise crashes itself, you won’t get a JVM error log.

Is there any way to check whether I am telling program not to write the JVM log file. Any place to check what is the settings like?

It would be in the arguments to java . Look at how you’re running the daemon — do you pass any arguments to it like ErrorFile? If not, you’re not telling it not to write the file.

Источник

JVM crash log file

If the JVM is crashing, it should leave the hs_err_pidXXXX.log in the directory it’s run from. If you want to send it somewhere else, you can run java with -XX:ErrorFile=/path/to/file.

Related videos on Youtube

user111196

Updated on September 18, 2022

Comments

I have a java application running as a daemon. Suddenly it stop working so I would like to know if jvm crash and where will the log file be dump? It can be either fedora or centos?

I ran this command find / -name hs_err found no file. So that means not jvm crash event is it or must I set it some where first?

Unless you’re telling java not to write that file, that basically means that yes, JVM is not crashing. But that file will only be created if the JVM crashes — if your program has an uncaught error or otherwise crashes itself, you won’t get a JVM error log.

Is there any way to check whether I am telling program not to write the JVM log file. Any place to check what is the settings like?

It would be in the arguments to java . Look at how you’re running the daemon — do you pass any arguments to it like ErrorFile? If not, you’re not telling it not to write the file.

Источник