Markup /qa/89

Comment
```
Aug 14 09:34:54 ocgclub java[860]: 09:34:54.578 [virtual-20702] ERROR s.t.s.n.sync.NettySyncServerOptions$ - Exception when handling request: POST /thread/23, by: POST /thread/{thread}, took: 144ms
Aug 14 09:34:54 ocgclub java[860]: java.io.IOException: Cannot run program "exiv2": Failed to exec spawn helper: pid: 48769, exit code: 1, error: 0 (none)
Aug 14 09:34:54 ocgclub java[860]: Possible reasons:
Aug 14 09:34:54 ocgclub java[860]:   - Spawn helper ran into JDK version mismatch
Aug 14 09:34:54 ocgclub java[860]:   - Spawn helper ran into unexpected internal error
Aug 14 09:34:54 ocgclub java[860]:   - Spawn helper was terminated by another process
Aug 14 09:34:54 ocgclub java[860]: Possible solutions:
Aug 14 09:34:54 ocgclub java[860]:   - Restart JVM, especially after in-place JDK updates
Aug 14 09:34:54 ocgclub java[860]:   - Check system logs for JDK-related errors
Aug 14 09:34:54 ocgclub java[860]:   - Re-install JDK to fix permission/versioning problems
Aug 14 09:34:54 ocgclub java[860]:   - Switch to legacy launch mechanism with -Djdk.lang.Process.launchMechanism=FORK
```

Restarted and it works.