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f9bd7f2012
Step 3: ====== Preserve worker pool information on either STOP SLAVE/Error. In case STOP SLAVE is executed worker threads will be gone, hence worker threads will be unavailable. Querying the table at this stage will give empty rows. To address this case when worker threads are about to stop, due to an error or forced stop, create a backup pool and preserve the data which is relevant to populate performance schema table. Clear the backup pool upon slave start.
87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
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/* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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#include "mariadb.h"
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#include "sql_priv.h"
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#include "rpl_reporting.h"
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#include "log.h" // sql_print_error, sql_print_warning,
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// sql_print_information
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#include "sql_class.h"
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Slave_reporting_capability::Slave_reporting_capability(char const *thread_name)
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: err_thread_id(0), m_thread_name(thread_name)
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{
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mysql_mutex_init(key_mutex_slave_reporting_capability_err_lock,
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&err_lock, MY_MUTEX_INIT_FAST);
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}
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void
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Slave_reporting_capability::report(loglevel level, int err_code,
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const char *extra_info,
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const char *msg, ...) const
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{
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void (*report_function)(const char *, ...);
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char buff[MAX_SLAVE_ERRMSG];
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char *pbuff= buff;
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uint pbuffsize= sizeof(buff);
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va_list args;
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va_start(args, msg);
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mysql_mutex_lock(&err_lock);
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switch (level)
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{
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case ERROR_LEVEL:
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/*
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It's an error, it must be reported in Last_error and Last_errno in SHOW
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SLAVE STATUS.
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*/
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pbuff= m_last_error.message;
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pbuffsize= sizeof(m_last_error.message);
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m_last_error.number = err_code;
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m_last_error.update_timestamp();
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report_function= sql_print_error;
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break;
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case WARNING_LEVEL:
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report_function= sql_print_warning;
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break;
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case INFORMATION_LEVEL:
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report_function= sql_print_information;
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break;
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default:
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va_end(args);
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DBUG_ASSERT(0); // should not come here
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return; // don't crash production builds, just do nothing
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}
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my_vsnprintf(pbuff, pbuffsize, msg, args);
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mysql_mutex_unlock(&err_lock);
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va_end(args);
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err_thread_id= current_thd->thread_id;
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/* If the msg string ends with '.', do not add a ',' it would be ugly */
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report_function("%s %s: %s%s %s%sInternal MariaDB error code: %d",
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(current_thd && current_thd->rgi_fake) ? "" : "Slave",
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m_thread_name, pbuff,
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(pbuff[0] && *(strend(pbuff)-1) == '.') ? "" : ",",
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(extra_info ? extra_info : ""), (extra_info ? ", " : ""),
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err_code);
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}
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Slave_reporting_capability::~Slave_reporting_capability()
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{
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mysql_mutex_destroy(&err_lock);
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}
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