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docs: add indexer-connector bulk indexing failure troubleshooting sec… #9470

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26 changes: 26 additions & 0 deletions source/user-manual/wazuh-dashboard/troubleshooting.rst
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Expand Up @@ -287,3 +287,29 @@ Check the following log files:
.. note::

The Wazuh indexer uses the ``/var/log`` folder to store logs by default.


Indexer-connector bulk indexing failures
-----------------------------------------

When the indexer-connector processes a bulk indexing operation, individual
documents may fail even when the server returns a general success response.
These failures are logged in ``/var/ossec/logs/ossec.log``.

To check for bulk indexing failures, run:

.. code-block:: console

# cat /var/ossec/logs/ossec.log | grep -i "Indexing failure"

A failure log entry looks like:

.. code-block:: none

ERROR: Indexing failure for index operation (status 400): document missing field

To check for version conflicts that were automatically handled:

.. code-block:: console

# cat /var/ossec/logs/ossec.log | grep -i "version conflict"