wohali edited a comment on issue #2437: Hung beam.smp sitting at 100% CPU URL: https://github.com/apache/couchdb/issues/2437#issuecomment-576929600 Another test hang: https://gist.github.com/wohali/5c903d20c023339c00a92ec322b9d1d2 Last test before hang: ``` chttpd_open_revs_error_test:105: should_return_503_error_for_open_revs_post_form...ok ``` After attaching gdb to the parent `beam.smp` and retrieving the backtrace, then detatching, the hang self-cleared (!) The tests then continued and hung again after: ``` couch_mrview_collation_tests:183: should_use_collator_for_reduce_grouping...ok [os_mon] memory supervisor port (memsup): Erlang has closed [os_mon] cpu supervisor port (cpu_sup): Erlang has closed [done in 1.117 s] [done in 1.272 s] module 'couch_mrview_purge_docs_tests' Map views ``` Results here: https://gist.github.com/wohali/2b6a8563658a468b5810a35b764f4a19 Detaching `gdb` from `beam.smp` didn't resume this time.
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