threaded-resolver: shutdown the resolver thread without error message #3630
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When a transfer is done, the resolver thread will be brought down. That could accidentally generate an error message in the error buffer even though this is not an error situationand the transfer would still return OK. An application that still reads the error buffer could find a "Could not resolve host: [host name]" message there and get confused. Reported-by: Michael Schmid Fixes #3629
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I'm not opposed to this but also I don't like the precedent. It's clearly documented that the error buffer is not valid on success. |
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I completely agree. The man page is crystal clear on this detail and I think any user who expects something different is wrong. However, we have started to slowly try to remedy this (returning data in the buffer when no error is returned) and this fix is one step along that path. |
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Related to this, @jay filed this PR on the PHP code itself to not show any error string unless an error was previously found: php/php-src#3901 - now merged. |
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When a transfer is done, the resolver thread will be brought down. That
could accidentally generate an error message in the error buffer even
though this is not an error situationand the transfer would still return
OK. An application that still reads the error buffer could find a
"Could not resolve host: [host name]" message there and get confused.
Reported-by: Michael Schmid
Fixes #3629