The idea of the auto-discovery protocol is to fetch the .frm files for the NDB tables stored in the data dictionary of the data nodes, and put them in the data directory of the mysql server.
However, sometimes (not always, which makes it more difficult to reproduce and hence fix), the auto-discovery seems to make strange things (from this bug report):
After shuting down and restoring my cluster I get the following error.[Read more...]
090211 9:59:26 [Note] NDB: mismatch in frm for panel.gatewayquestions, discovering...
090211 9:59:26 [Note] NDB Binlog: DISCOVER TABLE Event: REPL$panel/gatewayquestions
090211 9:59:26 [Note] NDB Binlog: logging ./panel/gatewayquestions (UPDATED,USE_WRITE)