# IngestProcessorException: pipeline [my_pipeline] processor [grok] failed with message [grok pattern [%{GREEDYDATA:message}] timed out after [5000ms]]

- **ID:** `elasticsearch/ingest-pipeline-grok-timeout`
- **Domain:** elasticsearch
- **Category:** runtime_error
- **Error Code:** `ES_INGEST_GROK_TIMEOUT`
- **Verification:** ai_generated
- **Fix Rate:** 84%

## Root Cause

A grok pattern in an ingest pipeline takes too long to match due to complex regex or large input data, exceeding the default timeout.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 7.17.0 | active | — | — |
| 8.11.0 | active | — | — |
| 8.12.0 | active | — | — |

## Workarounds

1. **Optimize the grok pattern by replacing `%{GREEDYDATA}` with more specific patterns (e.g., `%{DATA}` or `%{TIMESTAMP_ISO8601}`) and using anchors like `^` and `$`.** (85% success)
   ```
   Optimize the grok pattern by replacing `%{GREEDYDATA}` with more specific patterns (e.g., `%{DATA}` or `%{TIMESTAMP_ISO8601}`) and using anchors like `^` and `$`.
   ```
2. **Set `ignore_failure: true` on the grok processor to skip failures on problematic documents, and add a `set` processor to flag unparsed fields.** (80% success)
   ```
   Set `ignore_failure: true` on the grok processor to skip failures on problematic documents, and add a `set` processor to flag unparsed fields.
   ```
3. **Use `POST _ingest/pipeline/_simulate` to test patterns on sample data and identify performance bottlenecks.** (90% success)
   ```
   Use `POST _ingest/pipeline/_simulate` to test patterns on sample data and identify performance bottlenecks.
   ```

## Dead Ends

- **** — Masks the problem but doesn't fix pattern inefficiency; can cause pipeline backpressure and node resource exhaustion. (70% fail)
- **** — Loses parsing functionality, leading to unparsed raw data and downstream analysis issues. (90% fail)