NDB-memcached Completely Consumes One CPU Core Resource (Doc ID 1997578.1)

Last updated on JUNE 30, 2016

Applies to:

MySQL Cluster - Version 7.3 to 7.4 [Release 7.3 to 7.4]
Information in this document applies to any platform.

Symptoms

Once a client accesses the NDB memcached, the daemon starts consuming the whole resources of that one CPU. This is due to an improper handling of what is inside a loop. When the daemon polls new requests, it doesn't wait at all, even if it's idle. This results in making one CPU core busy all time.

Changes

The problem doesn't happen on 7.2 series. Once an upgrad from 7.2 to 7.3 or 7.4 is performed, then the issue will be encountered.

Cause

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