Elastic search error -- "failed to obtain node locks"

Startup error message:

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Find the main information: failed to obtain node locks
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An error occurred while binding nodes !!!

Many people have also encountered this problem after Baidu, probably because the elasticsearch has not been properly closed.

Step 1: run the command: PS aux | grep 'elasticic 'To View Details. For example:
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Step 2: run the command kill-9 to disable the process.

Step 3: restart es .. /Bin/elasticsearch

Elastic search error -- "failed to obtain node locks"