One of my nodes crashed without reason

Hello ,
It's been 219 days since this issue went into Incomplete and we haven't heard
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I'm jira-bot, Percona's automated helper script. Your bug report is important
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Hello

Thank you for the report.

Please upgrade PXC to the latest  PXC 5.6 version and check if this issue still exists. If you still see the same issue please provide us more information about crash along with mysql error log file.