ed44c45be1
When a backend is waiting for a response but no statement is stored for the session, the buffer where the stored statement is copied is not modified. This means that it needs to be initialized to a NULL value. Added a test that checks that the behavior works as expected even with persistent connections. A second test reproduces the crash by executing parallel SET commands while slaves are blocked. There is still a behavioral problem in readwritesplit. If a session command is being executed and it fails on a slave, an error is sent to the client. In this case it would not be necessary to close the session if the master is still alive.
51 lines
1.2 KiB
C++
51 lines
1.2 KiB
C++
/**
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* Test for MXS-1323.
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* - Check that retried reads work with persistent connections
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*/
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#include "testconnections.h"
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void* async_block(void* data)
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{
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TestConnections *test = (TestConnections*)data;
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sleep(5);
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test->tprintf("Blocking slave");
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test->repl->block_node(1);
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return NULL;
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}
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std::string do_query(TestConnections& test)
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{
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MYSQL* conn = test.open_rwsplit_connection();
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const char* query = "SELECT SLEEP(10), @@server_id";
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char output[512] = "";
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find_field(conn, query, "@@server_id", output);
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mysql_close(conn);
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return std::string(output);
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}
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int main(int argc, char *argv[])
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{
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TestConnections test(argc, argv);
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char server_id[2][1024];
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test.repl->connect();
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std::string master = test.repl->get_server_id_str(0);
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std::string slave = test.repl->get_server_id_str(1);
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test.repl->close_connections();
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test.set_timeout(60);
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test.add_result(do_query(test) != slave, "The slave should respond to the first query");
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pthread_t thr;
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pthread_create(&thr, NULL, async_block, &test);
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test.add_result(do_query(test) != master, "The master should respond to the second query");
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pthread_join(thr, NULL);
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test.repl->unblock_node(1);
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return test.global_result;
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}
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