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40c0b2c6c8
a deadlock between I/O and SQL threads in replication when relay_log_space is too small. This fixes bug #79. sql/log.cc: New variable rli->ignore_log_space_limit to resolve a deadlock between I/O and SQL threads in replication when relay_log_space is too small. sql/slave.cc: New variable rli->ignore_log_space_limit to resolve a deadlock between I/O and SQL threads in replication when relay_log_space is too small. sql/slave.h: New variable rli->ignore_log_space_limit to resolve a deadlock between I/O and SQL threads in replication when relay_log_space is too small. sql/sql_repl.cc: New variable rli->ignore_log_space_limit to resolve a deadlock between I/O and SQL threads in replication when relay_log_space is too small.
34 lines
972 B
Plaintext
34 lines
972 B
Plaintext
# The slave is started with relay_log_space_limit=1024 bytes,
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# to force the deadlock
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source include/master-slave.inc;
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connection slave;
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stop slave;
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connection master;
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create table t1 (a int);
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let $1=200;
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disable_query_log;
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while ($1)
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{
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# eval means expand $ expressions
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eval insert into t1 values( $1 );
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dec $1;
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}
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# This will generate one 10kB master's binlog
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enable_query_log;
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save_master_pos;
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connection slave;
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reset slave;
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start slave;
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# The I/O thread stops filling the relay log when
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# it's 1kB. And the SQL thread cannot purge this relay log
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# as purge is done only when the SQL thread switches to another
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# relay log, which does not exist here.
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# So we should have a deadlock.
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# if it is not resolved automatically we'll detect
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# it with master_pos_wait that waits for farther than 1kB;
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# it will timeout after 45 seconds;
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# also the slave will probably not cooperate to shutdown
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# (as 2 threads are locked)
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select master_pos_wait('master-bin.001',5000,45)=-1;
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