Error
- mwversion: 1.37.0-wmf.3
- reqId: 01725791-48b9-472a-9d7f-be0a2ef2be28
- Find reqId in Logstash
- Find normalized_message in Logstash
normalized_message
[{reqId}] {exception_url} PHP Warning: Cannot modify header information - headers already sent by (output started at /srv/mediawiki/php-1.37.0-wmf.3/includes/MediaWiki.php:817)exception.trace
from /srv/mediawiki/php-1.37.0-wmf.3/includes/WebResponse.php(74)
#0 [internal function]: MWExceptionHandler::handleError(integer, string, string, integer, array)
#1 /srv/mediawiki/php-1.37.0-wmf.3/includes/WebResponse.php(74): header(string, boolean)
#2 /srv/mediawiki/php-1.37.0-wmf.3/includes/OutputPage.php(2511): WebResponse->header(string)
#3 /srv/mediawiki/php-1.37.0-wmf.3/includes/OutputPage.php(2662): OutputPage->sendCacheControl()
#4 /srv/mediawiki/php-1.37.0-wmf.3/includes/exception/MWExceptionRenderer.php(147): OutputPage->output()
#5 /srv/mediawiki/php-1.37.0-wmf.3/includes/exception/MWExceptionRenderer.php(66): MWExceptionRenderer::reportHTML(Wikimedia\RequestTimeout\RequestTimeoutException)
#6 /srv/mediawiki/php-1.37.0-wmf.3/includes/exception/MWExceptionHandler.php(106): MWExceptionRenderer::output(Wikimedia\RequestTimeout\RequestTimeoutException, integer)
#7 /srv/mediawiki/php-1.37.0-wmf.3/includes/exception/MWExceptionHandler.php(185): MWExceptionHandler::report(Wikimedia\RequestTimeout\RequestTimeoutException)
#8 /srv/mediawiki/php-1.37.0-wmf.3/includes/exception/MWExceptionHandler.php(156): MWExceptionHandler::handleException(Wikimedia\RequestTimeout\RequestTimeoutException, string)
#9 [internal function]: MWExceptionHandler::handleUncaughtException(Wikimedia\RequestTimeout\RequestTimeoutException)
#10 {main}Impact
Notes
- Happening on enwiki
- Spike of ~24 occurrences in a period of about an hour
- May be parsoid-related based on the server this is happening on?
- Relates to pagebundle / rest API