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InnoDB could return the same list again and again if the buffer passed to trx_recover_for_mysql() is smaller than the number of transactions that InnoDB recovered in XA PREPARE state. We introduce the transaction state TRX_PREPARED_RECOVERED, which is like TRX_PREPARED, but will be set during trx_recover_for_mysql() so that each transaction will only be returned once. Because init_server_components() is invoking ha_recover() twice, we must reset the state of the transactions back to TRX_PREPARED after returning the complete list, so that repeated traversals will see the complete list again, instead of seeing an empty list. Without this tweak, the test main.tc_heuristic_recover would hang in MariaDB 10.1.
46 lines
1.0 KiB
Plaintext
46 lines
1.0 KiB
Plaintext
-- source include/have_innodb.inc
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-- source include/have_debug.inc
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-- source include/not_embedded.inc
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call mtr.add_suppression("Found 50 prepared XA transactions");
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create table t1 (a int) engine=innodb;
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insert into t1 values(1);
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let $trial = 50;
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while ($trial)
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{
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--connect (con$trial, localhost, root,,)
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let $st_pre = `select concat('test', $trial)`;
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eval xa start '$st_pre';
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insert into t1 values(1);
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eval xa end '$st_pre';
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eval xa prepare '$st_pre';
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dec $trial;
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}
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connection default;
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# Kill and restart the server.
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-- exec echo "wait" > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect
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-- shutdown_server 0
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-- source include/wait_until_disconnected.inc
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-- exec echo "restart:--debug_dbug=+d,min_xa_len" > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect
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-- enable_reconnect
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-- source include/wait_until_connected_again.inc
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-- disable_reconnect
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--sorted_result
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xa recover;
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--sorted_result
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xa recover;
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--disable_query_log
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let $trial = 50;
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while ($trial)
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{
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let $st_pre = `select concat('test', $trial)`;
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eval xa commit '$st_pre';
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dec $trial;
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}
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--enable_query_log
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xa recover;
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drop table t1;
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