Nothing happens when clicking Link Bitbucket Cloud or Github account

Summary

DVCS accounts - Link account button not working

Environment

• Chrome
• Mozilla Firefox

Steps to Reproduce

Go to DVCS page in Jira and Click Link Bitbucket Cloud or Github account

Expected Results

A dialog box will appear to add a new account.

Actual Results

Nothing is happening when Link Bitbucket Cloud or Github account is clicked.

Workaround

1. Stop JIRA
2. Remove the JIRA_HOME/plugin/installed-plugins/jira-dvcs-connector-plugin-4.3.0.jar file
3. Download and move jira-dvcs-connector-plugin-4.2.1.jar into that directory
4. Start JIRA

Notes:

• The following will be shown if JIRA is upgraded to 7.8.1 that has an existing DVCS Accounts.
  
• JIRA log will shows the following logging and fixed the error message after followed the workaround:

  2018-03-27 14:25:48,991 DVCSConnector.MessageExecutor:thread-24 ERROR ServiceRunner     [c.a.j.p.d.service.message.MessageConsumer] Synchronization failed: Index: 0, Size: 0
  java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
  	at java.util.ArrayList.rangeCheck(ArrayList.java:653)
  	at java.util.ArrayList.get(ArrayList.java:429)
  	at com.atlassian.jira.plugins.dvcs.dao.impl.querydsl.MessageDaoQueryDsl.getById(MessageDaoQueryDsl.java:203)