CODEWITHSUNDEEP
wso2-iot
Vishwanath
Vishwanath

Reputation: 151

Getting Warning Error in WSO2 for every 30 seconds

[date time, 804] [Iot - Core] WARN - FileSystemPreferences Could not lock System prefs. Unix error code 0.

[date time, 805] [Iot - Core] WARN - FileSystemPreferences Couldn't Flush system prefs: java.util.prefs.BackingStoreException: Couldn't get file lock.

Upvotes: 4

Views: 1844

Answers (3)

Andres Tinoco
Andres Tinoco

Reputation: 43

It seems that the /etc/.java/.systemPrefs/ and /etc/.java/ directories do not exist on your system, which may be the cause of the error you are experiencing. These directories may not be created automatically and you may have to create them manually.

You can try creating the directories and then changing the permissions and owner. Here are the commands to do this:

sudo mkdir -p /etc/.java/.systemPrefs sudo mkdir -p /etc/.java sudo chown -R user:user /etc/.java/.systemPrefs sudo chown -R user:user /etc/.java sudo chmod -R 755 /etc/.java/.systemPrefs sudo chmod -R 755 /etc/.java

Upvotes: 0

Eduardo Vilaça
Eduardo Vilaça

Reputation: 7

I was getting the same message under the same interval, and this fixed it i guess you need full priveliege to write execute and open on that folder.

chmod 777 /etc/.java/.systemPrefs/
chmod 777 /etc/.java/

Upvotes: 0

Rasika Perera Govinnage
Rasika Perera Govinnage

Reputation: 2254

This is a JVM related issue. JVM needs write access to the /etc/.java/.systemPrefs directory, which it cannot access when run as a non-root user, see: http://bugs.java.com/view_bug.do?bug_id=4838770

Try changing ownership of the /etc/.java/.systemPrefs directory to the current user [eg. wso2:wso2] using

sudo chown -R wso2:wso2 /etc/.java/.systemPrefs

The file will still be writable by root (as root can write to any file), but if you need multiple users to be able to write to this file you might set up a file ACL as well using:

sudo setfacl -R -m u:wso2:rw /etc/.java/.systemPrefs

Copied from here

Upvotes: 5

Related Questions