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child_process: fix data loss with readable event (v0.12) #5037

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mscdex
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@mscdex mscdex commented Feb 2, 2016

This commit prevents child process stdio streams from being automatically flushed on child process exit/close if a 'readable' event handler has been attached at the time of exit.

Without this, child process stdio data can be lost if the process exits quickly and a read() (e.g. from a 'readable' handler) hasn't had the chance to get called yet.

Fixes: #5034

@mscdex mscdex added child_process Issues and PRs related to the child_process subsystem. land-on-v0.12 labels Feb 2, 2016
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jasnell commented Feb 2, 2016

LGTM

This commit prevents child process stdio streams from being
automatically flushed on child process exit/close if a 'readable'
event handler has been attached at the time of exit.

Without this, child process stdio data can be lost if the process
exits quickly and a `read()` (e.g. from a 'readable' handler)
hasn't had the chance to get called yet.

Fixes: nodejs#5034
@mscdex mscdex force-pushed the fix-child-process-flush-stdio-v012 branch from 9e9e99f to 3e7af8d Compare February 4, 2016 02:23
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mscdex commented Feb 4, 2016

mscdex added a commit that referenced this pull request Feb 11, 2016
This commit prevents child process stdio streams from being
automatically flushed on child process exit/close if a 'readable'
event handler has been attached at the time of exit.

Without this, child process stdio data can be lost if the process
exits quickly and a `read()` (e.g. from a 'readable' handler)
hasn't had the chance to get called yet.

Fixes: #5034
PR-URL: #5037
Reviewed-By: James M Snell <[email protected]>
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mscdex commented Feb 11, 2016

Landed in 18ab5d4.

@mscdex mscdex closed this Feb 11, 2016
@mscdex mscdex deleted the fix-child-process-flush-stdio-v012 branch February 11, 2016 17:51
MylesBorins pushed a commit that referenced this pull request Feb 11, 2016
This commit prevents child process stdio streams from being
automatically flushed on child process exit/close if a 'readable'
event handler has been attached at the time of exit.

Without this, child process stdio data can be lost if the process
exits quickly and a `read()` (e.g. from a 'readable' handler)
hasn't had the chance to get called yet.

Fixes: #5034
PR-URL: #5037
Reviewed-By: James M Snell <[email protected]>
jBarz pushed a commit to ibmruntimes/node that referenced this pull request Nov 4, 2016
This commit prevents child process stdio streams from being
automatically flushed on child process exit/close if a 'readable'
event handler has been attached at the time of exit.

Without this, child process stdio data can be lost if the process
exits quickly and a `read()` (e.g. from a 'readable' handler)
hasn't had the chance to get called yet.

Fixes: nodejs/node#5034
PR-URL: nodejs/node#5037
Reviewed-By: James M Snell <[email protected]>
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2 participants