| Previous | Next |
| MSG_CI_MASTER_MERGE_ABORTED_LOW_DISK | MSG_CI_MASTER_MERGE_REASON_INDEX_LIMIT |
MSG_CI_MASTER_MERGE_REASON_EXTERNAL
MSG_CI_MASTER_MERGE_REASON_EXTERNAL explains why the merge started: the trigger came from outside the normal internal merge heuristics. This is useful when a maintenance tool, administrator, or automation invokes a forced merge and the resulting resource activity needs attribution.
Identify the caller before tuning automatic merge behavior
- Correlate the event time with administration scripts, maintenance jobs, and catalog-management calls.
- Do not interpret the event as evidence that the catalog independently reached an index-count or document-count threshold.
- If forced merges are frequent, review the external workflow and measure whether it is creating unnecessary I/O contention.
Microsoft documents a ForceMasterMerge administration operation for the legacy Indexing Service catalog. An external-reason event is therefore a trigger classification, not an error result. The appropriate diagnostic is provenance: who requested the merge, under which maintenance policy, and whether another merge was already active. Changing crawler scope or document filters will not remove an explicit administrative trigger.
Forcing a master merge · Merging indexes · Catalog administration example
Looking for a different code? Search another status or error code.