Jira reindex says: This process is 2147483647% Completed.

I'm running a reindex of our database and I'm getting a maxint value back on the % complete when other people connect. Haven't seen this before..

JIRA Access Constraints
You cannot access JIRA at present. Look at the table below to identify the reasons

Time Level Type Description Exception
2005-07-14 12:17:15 warning reindex JIRA is currently being reindexed. Depending on how large the issue database is, this may take a few minutes. Jira will automatically become available as soon as this task is complete.
This process is 2147483647% Completed.