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  1. ,

    Check if there is no nexus running. If not, delete sonatype-work/nexus/nexus.lock .

  2. ,

    checkState() is Static convenience methods that help a method or constructor check whether it was invoked correctly (whether its preconditions have been met). This occurs when the precondition does not met.

Solutions on the web

via Apache's JIRA Issue Tracker by Juhani Connolly, 2 years ago
via Google Groups by Ming Zhao(赵明), 1 year ago
via Google Groups by jbl, 1 year ago
Work already begun on this thread. Looks like you have called UnitOfWork.begin() twice without a balancing call to end() in between.
Empty query.