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Fix Process resource leak in system metrics collection - #17212
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Pull request overview
This pull request fixes process resource leaks in Linux system metrics collection by adding proper process lifecycle management. The changes ensure that child processes spawned via Runtime.exec() are properly waited for and cleaned up, preventing zombie processes and file descriptor leaks that could accumulate over time in periodic metrics collection.
Changes:
- Added
process.waitFor()calls to reap child processes after reading their output - Added
finallyblocks withprocess.destroyForcibly()to ensure cleanup on exceptions - Added proper
InterruptedExceptionhandling with interrupt flag restoration
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
| SystemMetrics.java | Fixed process resource leak in Linux memory metrics collection by adding waitFor(), destroyForcibly(), and InterruptedException handling |
| LinuxNetMetricManager.java | Fixed process resource leak in socket count metrics collection by adding waitFor(), destroyForcibly(), and InterruptedException handling |
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Add process.waitFor() and process.destroyForcibly() in finally block to prevent zombie processes when collecting system memory and network metrics via Runtime.exec(). Guard destroyForcibly() with isAlive() check to avoid killing already-exited processes. Also handle InterruptedException and NumberFormatException properly. Affected files: - SystemMetrics: memory info collection via 'free' command - LinuxNetMetricManager: socket count collection via 'ls /proc/fd' Signed-off-by: ffccites <99155080+PDGGK@users.noreply.github.com>
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Summary
process.waitFor()andprocess.destroyForcibly()infinallyblock to prevent zombie processes in periodic metrics collectionInterruptedExceptionproperly by restoring the interrupt flagSystemMetrics(memory) andLinuxNetMetricManager(socket count)Fixes #17211
Test plan