Handling Java profiling exceptions

[prashantbytesyntax]

During Java profiling with gProfiler, exceptions and crashes are observed in:

1. jattach: A lightweight tool used to communicate with the JVM Attach Listener.
2. Async-profiler: A low-overhead Java profiler that interacts with the JVM.

Trace
[2025-04-29 08:02:04,975] ERROR: gprofiler.profilers.profiler_base: JavaProfiler: failed to profile process <process_id> Traceback (most recent call last): File "gprofiler/profilers/profiler_base.py", line 143, in _wait_for_profiles File "concurrent/futures/_base.py", line 451, in result File "concurrent/futures/_base.py", line 403, in __get_result File "concurrent/futures/thread.py", line 58, in run File "gprofiler/profilers/java.py", line 1283, in _profile_process File "gprofiler/profilers/java.py", line 1305, in _profile_ap_process File "gprofiler/profilers/java.py", line 811, in start_async_profiler File "gprofiler/profilers/java.py", line 770, in _run_async_profiler gprofiler.profilers.java.JattachSocketMissingException: Command ['/tmp/_MEIPXzD02/gprofiler/resources/java/asprof', '21644', 'load', '/tmp/gprofiler_tmp/async-profiler-v3.0g1/glibc/libasyncProfiler.so', 'true', 'start,event=cpu,file=/tmp/gprofiler_tmp/tmp645x_mxv/async-profiler-21644.output,collapsed,ann,sig,interval=90909090,log=/tmp/gprofiler_tmp/tmp645x_mxv/async-profiler-21644.log,fdtransfer=@async-profiler-<process_id>-<id>,safemode=0,,features=probesp+vtable,timeout=90'] returned non-zero exit status 1. stdout: stderr: Could not start attach mechanism: No such file or directory

These issues manifest as:

1. Core dumps: Generated due to crashes in jattach or async-profiler, consuming significant disk space.
2. Profiling interruptions: Profiling sessions fail due to invalid attach requests or missing resources.

Suggested Improvements :

1. Add an Option in gProfiler to Disable Core Dumps for Async-Profiler and jattach
2. Add a Check for Attach Socket File Before Starting Async-Profiler

[mlim19]

@prashantbytesyntax, can you provide the detailed instruction as to how to reproduce the issue? We will try reproduce and debug from there.

[prashantbytesyntax]

@prashantbytesyntax, can you provide the detailed instruction as to how to reproduce the issue? We will try reproduce and debug from there.

Core dump generation is not easily reproducible but i can help with the exception for JAttach missing socket. Kill the target java process.

[prashantbytesyntax]

@prashantbytesyntax, can you provide the detailed instruction as to how to reproduce the issue? We will try reproduce and debug from there.

Core dump generation is not easily reproducible but i can help with the exception for JAttach missing socket. Kill the target java process.

option in gprofiler to disable to all child process will help here

[mlim19]

@prashantbytesyntax, do you still see the issue? I couldn't reproduce it on my end. If this needs to draw our attention as a priority, let us know.