I got this issue without any configuration change.
That is entirely possible.
The warning tells you that 11e6 messages came in where Elastic could not properly handle the indexing. The messages are stored just fine! But indexing failed for at least a number of fields. If you click the “Show errors” button, it will specifically tell you which messages and fields are problematic.
How can we solve it ?
i already find out solution
Would you be willing to share your solution? For other people who may have this issue…