MySQL Cluster Versions 7.1.34, 7.2.19, 7.3.8 With SQL Node Disconnected With Exceeded MaxBufferedEpochs (100 > 100) error (Doc ID 2132540.1)

Last updated on MAY 24, 2016

Applies to:

MySQL Cluster - Version 7.1 to 7.3 [Release 7.1 to 7.3]
Information in this document applies to any platform.

Symptoms

MySQL Cluster versions affected: 7.1.34, 7.2.20 and 7.3.8.

SQL node disconnected with the following message:   

2016-02-17 00:53:56 [MgmtSrvr] WARNING  -- Node 5: Disconnecting node 54 because it has exceeded MaxBufferedEpochs (100 > 100), epoch 2730369/5 

Stack trace has ClusterMgr.cpp references:

#3  0x00007f5006d56daa in lock (this=0x7f5000c5e000) at /PLATsoftware/mysql/mysql-cluster-com-7.3.8/storage/ndb/src/ndbapi/ClusterMgr.hpp:77
#4  ClusterMgr::is_cluster_completely_unavailable (this=0x7f5000c5e000) at /PLATsoftware/mysql/mysql-cluster-com-7.3.8/storage/ndb/src/ndbapi/ClusterMgr.cpp:1138

Changes

Result of a fix of Bug 19524096 on versions 7.1.34, 7.2.20 and 7.3.8.

Cause

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