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"Failed to add entry to queue" on adding a label to a page




We've been running Confluence 6.9.1 for a few weeks with out this issue.

Since yesterday we can no longer create new pages from any template that includes a label by default. Such as 'Product Requirements' template will include 'requirements' label.

The page can be created, but it can not be saved until the label is removed. The error I see from users perspective is:

Unable to communicate with server. Saving is not possible at the moment.

on removing the label/s, the page saves OK.


Similarly, for an existing page I can no longer add a label, in the label window I can select existing labels but on clicking "ADD" I get the following error:

com.atlassian.confluence.api.service.exceptions.ServiceException: Failed to add entry to queue

Thus I believe the issue I have here is within the labels.

I do not know what has changed. I have recently installed the Multi-vote plugin, and as part of problem solving have since disabled that plugin - which made no difference.

I have checked the database configuration as per:

which looks correct.


I do not use collaborative editing (stuck on IIS 6.0).


Any thoughts or suggestions?




EDIT: Confluence logs, from the point of clicking "ADD" in the label dialog.

1 answer

1 accepted

0 votes
Answer accepted
R. Fuerst Atlassian Team Jul 06, 2018

Hi Andrew, 

Thanks for attaching those logs - they were super helpful! It looks like this is the error that's causing the issue:

Caused by: org.springframework.dao.DataAccessResourceFailureException: Failed to read id for journal 'main_index': For input string: "      "; nested exception is java.lang.NumberFormatException: For input string: " 

This can be caused by a corrupt index and ‘main_index’ file which can happen sometimes after an upgrade. To fix it, please follow the guide below:

Hope it helps! 


Thank you Rachel for your help, and for highlighting the key information in the logs.


I followed the how-to linked in your link:


I've removed those index and journal directories and re-index confluence - the problem is now resolved.


Thank you.

This guide also worked for us.

Thanks for sharing. 


I had the same issues and could solve them with this guide.

Thank you for this guide.


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