DataSender::sendData assumes that an exception is thrown when the update failed. It is not always the case, now that we use a proxy a 4xx response can be returned by Nginx (It is maybe a limitation in Elastica) and no exception will be thrown.
We should inspect response status and log properly an error.
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I'm not having the best of luck convincing nginx to give up 4xx errors (beyond forcing them with the config file), any suggestions?
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The particular error we had was due to a very large doc that was refused by nginx (max of 1m by default iirc) and should be 413.
Maybe another case would be to trigger a timeout between nginx and elastic with a firewall rule, that should trigger a 504 maybe?
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Change 290722 had a related patch set uploaded (by EBernhardson):
Fail and log error if page was not properly indexed
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Change 291111 had a related patch set uploaded (by EBernhardson):
Fail and log error if page was not properly indexed
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Change 290722 abandoned by EBernhardson:
Fail and log error if page was not properly indexed
Reason:
es2.x branch merged to master, this patch is no longer necessary instead will merge into master
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Change 291111 merged by jenkins-bot:
Fail and log error if page was not properly indexed