At index time I'm have trying to extract and index the field app from the audittrail Audit:[timestamp=04-27-2023 16:51:22.073, user=test, action=search, info=completed, search_id='1682628653.251613', has_error_warn=false, fully_completed_search=true, total_run_time=0.61, event_count=9, result_count=0, available_count=9, scan_count=9, drop_count=0, exec_time=1682628653, api_et=1682539200.000000000, api_lt=1682628653.000000000, api_index_et=N/A, api_index_lt=N/A, search_et=1682539200.000000000, search_lt=1682628653.000000000, is_realtime=0, savedsearch_name="", search_startup_time="88", is_prjob=false, is_flex_search=false, rate_limit_retry_enabled=false, acceleration_id="E06599A7-7307-4983-8459-FD948B9F996B_search_argus_test_6d524bc0f6be8430", app="search", provenance="UI:Search", mode="historical", From my tests it' doesn't matter what REGEX I used in the transforms.conf, there seems to be a behavior where the [audittrail] is read only props.conf [audittrail]
TRANSFORMS-audit_addMetadata = add_app_to_metadata transforms.conf [add_app_to_metadata]
SOURCE_KEY = _raw
REGEX = app=\"([^"]+)
FORMAT = mApp::$1
WRITE_META = true
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