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Hit this when working on MDEV-25304:
Apply this patch:
diff --git a/sql/sql_repl.cc b/sql/sql_repl.cc
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index 084259d863d..fbc1e637abc 100644
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--- a/sql/sql_repl.cc
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+++ b/sql/sql_repl.cc
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@@ -3966,6 +3966,8 @@ int reset_master(THD* thd, rpl_gtid *init_state, uint32 init_state_len,
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ret= mysql_bin_log.reset_logs(thd, 1, init_state, init_state_len,
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next_log_number);
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repl_semisync_master.after_reset_master();
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+ DBUG_EXECUTE_IF("reset_master_done", DBUG_SUICIDE(););
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+
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return ret;
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}
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then run this testcase (put in storage/rocksdb/mysql-test/rocksdb/t/binlog_rotate.test ):
--source include/have_rocksdb.inc
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--source include/have_log_bin.inc
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set global rocksdb_flush_log_at_trx_commit=1;
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create table t1 (a int, b int, key(a)) engine=rocksdb;
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insert into t1 values (1,1),(2,2);
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select * from t1;
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flush tables;
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--write_file $MYSQLTEST_VARDIR/tmp/mysqld.1.expect
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restart
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EOF
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set @@debug_dbug="+d,reset_master_done";
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--disable_reconnect
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--error 0,2013
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RESET MASTER;
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--enable_reconnect
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--source include/wait_until_connected_again.inc
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select * from t1;
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drop table t1;
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and observe:
...
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set global rocksdb_flush_log_at_trx_commit=1;
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create table t1 (a int, b int, key(a)) engine=rocksdb;
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insert into t1 values (1,1),(2,2);
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select * from t1;
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a b
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1 1
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2 2
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flush tables;
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set @@debug_dbug="+d,reset_master_done";
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RESET MASTER;
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select * from t1;
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a b
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drop table t1;
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The INSERTs are lost.
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