LibreOffice doesn't handle multi-threading reliably and would crash.

As one of the Libreoffice Manual say:

                  Do not start concurrent executions of jodconverter, as LibreOffice 
                   doesn't handle multi-threading reliably and would crash.

Now if your application have multiple requests at same point of time as Java supports multi-threading, I'm firing multiple libreoffice convert commands but somehow until the first command completes the second command doesn't complete even though the second document was quite small in size.

For Ex: First document given to convert is of size 2 MB Second document given to convert is of size 50 KB.Until the first document conversion completes, second document conversion doesn't complete even though the size of the 2nd document is quite small.This is the limitation of libreoffice that multi-threading is not supported.

SOLUTION:

Due to the Alfresco Enterprise support for JodConverter this solution is not valid for the Community version. JodConverter multiples LibreOffice instances can be invoked to manage more transactions if needed. For example, one process can handle up to 200 transformations and then it is automatically restarted, if you need to manage more than this and add parallel processes, just add more ports comma separated in the JodConverter port option as seen below:


  

After apply this change you can see three soffice processes: