Talend Remote Engine logs filled with message: org.apache.karaf.main.lock.SimpleFileLock lock INFO: Lock failed

wei_guo — Tue, 02 Jun 2026 12:16:19 GMT

After the Talend Remote Engine goes down, the Remote Engine logs repeatedly show the same message in TalendRemoteEngine/data/log/karaf.log:

org.apache.karaf.main.lock.SimpleFileLock lock INFO: Lock failed

Resolution

To resolve this, verify ownership and permissions of the application files, remove stale lock files, and restart the Talend Remote Engine:

Ensure that the dedicated Talend user and group have full recursive ownership over the application files to prevent any permission-related runtime errors:
```
sudo chown talenduser:talendgroup /opt/talend/TalendRemoteEngine -R
```
Adjust the absolute path `/opt/talend/` if your installation directory differs.

Stop the Talend Remote Engine Service:

sudo systemctl stop talend-remote-engine.service

Manually purge the stale or unsynced lock file that is blocking the engine startup:
```
rm /opt/talend/TalendRemoteEngine/lock
```
Restart the Talend Remote Engine Service. The engine will automatically generate a fresh, synced lock file upon a successful boot.
```
sudo systemctl start talend-remote-engine.service
```

Cause

An unexpected downtime or sudden disconnection of the Talend Remote Engine (RE) left the application's file lock (TalendRemoteEngine/lock) in an unsynced or stale state. Because the container detected this pre-existing lock file upon recovery, it assumed another process was already running, subsequently blocking all other dependent modules and services from initializing.

Environment

Talend Remote Engine

article Talend Remote Engine logs filled with message: org.apache.karaf.main.lock.SimpleFileLock lock INFO: Lock failed in Official Support Articles

Talend Remote Engine logs filled with message: org.apache.karaf.main.lock.SimpleFileLock lock INFO: Lock failed

Resolution

Cause

Environment