Export env vars logging Erlang crash dumps #3649
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Uncommenting these exports will output Erlang crash dumps to stderr,
rather than to an erl_crash.dump file.
Many folks run into issues trying to debug an Elixir application that
is crashing and the logs output this:
Crash dump is being written to: erl_crash.dump...done
Because our machines are ephemeral, this is cleared immediately and
there's no way get the file without doing shenanigans with your
Dockerfile. Now you have minimal shenanigans to get the info via
`fly logs`.
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gwuah
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Jun 18, 2024
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Change Summary
What and Why:
This will output Erlang crash dumps to stderr, rather than to an erl_crash.dump file.
Many folks run into issues trying to debug an Elixir application that is crashing and the logs output this:
Because our machines are ephemeral, this is cleared immediately and there's no way get the file without doing shenanigans with your Dockerfile. Now you have minimal shenanigans to get the info via
fly logs.How:
Environment variable exports
Related to:
https://community.fly.io/t/how-to-read-erl-crash-dump/20404?u=morzaram
Documentation