I'm having trouble tracking down the cause of an error message that is appearing in my logs every 15 minutes or so.
The cause of the error happened whilst performance testing a 3 node Galera Cluster (running on MariaDB 10.1.13). Two of the read-only nodes fell too far behind the write master causing them to request an SST sync and pulling the cluster off-line whilst the write master fulfilled the sync.
Since that point though the master has regularly been posting the following message into the logs:
2016-08-26 18:03:16 139975496911616 [ERROR] WSREP: failed to initialize io-cache
2016-08-26 18:03:16 139975496911616 [Warning] WSREP: binlog trx cache not empty (0 bytes) @ connection close 6510
2016-08-26 18:03:16 139975496911616 [Warning] WSREP: binlog stmt cache not empty (0 bytes) @ connection close 6510
Google is sparse on any details and the only good hit I've had is from the source code, which appears to suggest that it's unable to initialise a cache for reading or writing (hmmm, much like the error message suggests).
32 if (reinit_io_cache(cache, READ_CACHE, 0, 0, 0))
33 {
34 WSREP_ERROR("failed to initialize io-cache");
35 return ER_ERROR_ON_WRITE;
36 }
This message continues despite a reboot and full SST sync from the other nodes, so I'm a little lost as to the cause. Does anyone know what this means and how to fix it?
