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Change log level ERROR -> INFO for the RESOLVED FATAL: DataSource [" … #151

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Merged
rob-bygrave merged 1 commit into from
Jun 12, 2026
Merged

Change log level ERROR -> INFO for the RESOLVED FATAL: DataSource [" … #151

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8 changes: 6 additions & 2 deletions docs/guides/monitoring-pool-metrics.md
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Original file line number Diff line number Diff line change
Expand Up @@ -162,10 +162,14 @@ DataSourcePool pool = DataSourcePool.builder()
The pool also logs these transitions itself:

```
FATAL: DataSource [mypool] is down or has network error!!!
RESOLVED FATAL: DataSource [mypool] is back up!
FATAL: DataSource [mypool] is down or has network error!!! (logged at ERROR)
Resolved Fatal: DataSource [mypool] is back up! (logged at INFO)
```

The "down" transition is logged at `ERROR` and the recovery at `INFO` — deliberately, so that
returning to a healthy state does not itself trigger ERROR-level alerting. If you want to alert on
recovery, do it via the `dataSourceUp` callback above rather than by matching the log line.

---

## Borrow/return hooks with `DataSourcePoolListener`
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2 changes: 1 addition & 1 deletion ebean-datasource/src/main/java/io/ebean/datasource/pool/ConnectionPool.java
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Expand Up @@ -358,7 +358,7 @@ private void notifyUp() {
dataSourceUp.set(true);
startHeartBeatIfStopped();
dataSourceDownReason = null;
Log.error("RESOLVED FATAL: DataSource [" + name + "] is back up!");
Log.info("Resolved Fatal: DataSource [{0}] is back up!", name);
if (notify != null) {
notify.dataSourceUp(this);
}
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