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This is a small tool to post-process output from file-leak-detector when it is executed with dumpatshutdown.

file-leak-detector will simply print out all found stacktraces where file-handles were not closed.

This has a few shortcomings when running on large-scale projects:

  • Multiple equal stacktrace are printed, requiring to skim through many similar results
  • Many lines in the stacktraces are unimportant for analyzing the file-handle leaks, e.g. stack-trace lines from thread-pools, JUnit, ...

In order to make analyzing and fixing file-handle leaks easier, this tool parses one or more input text-files and extracts stacktraces that were produced by file-leak-detector and shortens and de-duplicate them into a smaller list of actual interesting code-locations.

The found stack-traces are printed to stdout. Summary/error information is printed to stderr.

So a typical invocation will redirect stdout to a file via > file-handle-leaks.txt

Getting started

Grab it
git clone https://github.com/centic9/file-leak-postprocess.git
cd file-leak-postprocess
Build it
./gradlew check installDist

Run it

build/install/file-leak-postprocess/bin/file-leak-postprocess <text-file> > file-handle-leaks.txt

There is also a script run.sh which performs the necessary steps and thus allows to run in one step

./run.sh /tmp/output.txt

How it works

The actual code is quite small, it parses the text-files and parses all found stacktraces.

Then it shortens the stacks and de-duplicates them for output so each stacktrace is only printed once.

Support this project

If you find this tool useful and would like to support it, you can Sponsor the author

Licensing

Copyright 2022-2024 Dominik Stadler

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.