This section documents all changes and bug fixes that have been applied since the release of MySQL Enterprise Monitor, version 2.0.4.
The FreeBSD 7 Agent was inadvertently a Linux binary.
shell> file mysqlmonitoragent-188.8.131.5253-freebsd7-x86-32bit-installer.bin mysqlmonitoragent-184.108.40.20653-freebsd7-x86-32bit-installer.bin: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs), stripped
Calling the Agent with the option
--agent-run-os-tests resulted in a crash. This
happened on Linux x86-64 systems. The resultant stack trace was:
(qa-merlin) 2009-03-04 16:39:42: (critical) chassis.c:1097: could not raise RLIMIT_NOFILE to 8192, Invalid argument (22). Current limit still 1024. sigar-test-all.c.124 (test_sigar_pid_get): pid = 5188 sigar-test-all.c.106 (test_sigar_mem_get): ...cut... sigar-test-all.c.427 (test_sigar_file_system_list_get): (items = 13)  fs.dirname = / fs.devname = /dev/mapper/vg00-root fs.typename = local fs.sys-type-name = ext3 fs.type = 2 fsusage.total = 15481840 fsusage.free = 14116140 fsusage.used = 1365700 fsusage.avail = 13329708 fsusage.files = 1966080 fsusage.use_percent = 0.100000  diskusage.reads = 315302 diskusage.writes = 6318240 diskusage.write_bytes = 25879511040 diskusage.read_bytes = 6561092608 diskusage.queue = 47457530080206 Segmentation fault
On some systems no output was shown, other than the message “Segmentation fault”. (Bug#43381)
Following a change in the replication configuration, MySQL Enterprise Monitor did not display the new topology correctly. (Bug#43240)
When a data collection became invalid, the agent sent NULLs for those collection values. However, the timestamps that it sent with the values were the timestamps from the last valid value that was collected.
Due to key constraints on the Service Manager side, MySQL Enterprise Monitor disregarded anything sent with duplicate timestamps, thus the NULLs received from the agent were never processed. Some mechanisms, such as replication discovery, depend on the NULLs to identify a situation where data has become invalid. (Bug#43239)
MySQL Enterprise Monitor did not add a log entry each time data was purged. The log entry should have noted how many rows of each type of data were purged (historical data, logs, quan data). (Bug#43159)
MySQL Enterprise Monitor generated a stack overflow. This was as a result of a bug in Hibernate, which caused Hibernate to enter infinite recursion while trying to load a relationship. (Bug#43107)
The “Table Cache Set Too Low For Startup” and
“Table Cache Not Optimal” rules were not supported
on MySQL 5.1 because the
variable was deprecated and replaced with
Migrated server was not completely deleted.
In a Monitor that had been updated from 1.3.2 to 2.0.4, with 2 database servers queued for migration, if a server being migrated was deleted, or a migrated server was deleted, this would not be reflected in the user interface or in the license count, until Tomcat was restarted. (Bug#42604)
The installer used to upgrade from version 1.3 corrupted passwords containing the “?” character. (Bug#42452)
The replication status of a server was displayed as “unknown”. However, the agent logged no errors and the server showed no other event problems. The server status was displayed as “up” and the database connection was also displayed as “up”. (Bug#42407)
Sun multi-core processors caused all cores to be reported on the meta information page.
The larger T-series SPARC processors have 32+ cores. This caused the meta information page in the Dashboard to scroll as it reported each one. (Bug#42355)
If an attempt was made to disable a rule using the link next to the rule, the following error message was generated:
U0002 You must log in to access the requested resource. Go to login page.
However, clicking on the link did not prompt the user to login again. (Bug#42313)
ssh-agent from OpenSSH or specifying
a malevolent value of
inject data into the monitored MySQL Server.
For example, setting
agent-host-id to the
value “I'm a test” would result in the
following message in the error log:
2009-01-23 15:45:11: ((error)) agent_mysqld.c:281: mysql_real_query('INSERT INTO mysql.inventory (name, value) VALUES ( 'hostid', 'I'm a test' )') on 'mysql' failed: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'm a test' )' at line 1 (mysql-errno = 1064)
SHOW GLOBAL STATUS returned a value
greater than 214748364, it was sent to the Service Manager as
The Agent failed to identify local sockets as local on Mac OS X 10.4.
If the Agent was configured to use a Unix domain socket on Mac OS X 10.4, it did not treat the connection as local and failed to provide CPU and memory information to MySQL Enterprise Monitor. This is shown in the log file:
2009-01-20 18:15:02: (message) network-socket.c:752: is-local family 0 != 1 2009-01-20 18:15:02: (message) agent_mysqld.c:322: [mysql] mysqld is not local or not directly connected
However, this problem did not happen on Mac OS X 10.5. (Bug#42220)
Some graphs on the Graph tab were not updated after the page was refreshed, or Update was clicked.
The only way to get an updated graph was to change the graph size (in pixels) and then click Update. (Bug#42162)
my.cnf file for the Enterprise Monitor
internal database had the following configuration item:
innodb_autoextend_increment = 50M
This generated the error:
16:36:23 [Warning] option 'innodb_autoextend_increment': unsigned value 52428800 adjusted to 1000
This variable is interpreted as being specified in MB, so 50M would be 50 TB. Such a high value results in the variable being adjusted to 1000 MB.
The value in the configuration file should be:
innodb_autoextend_increment = 50
A number of Advisor rules had advice text that had not been translated into Japanese. The Advisors that contained untranslated rules included Performance, Schema and Security. (Bug#42067)
The Service Manager did not handle the case where the agent
failed to supply a valid
Service Manager would then not restart. The logs contained the
2009-01-09 14:39:50,472 ERROR [main:org.springframework.web.context.ContextLoader] Context initialization failed org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'serverConnectionMonitor' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Unsatisfied dependency expressed through constructor argument with index 2 of type [com.mysql.etools.monitor.bo.Manager]: Error creating bean with name 'manager' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Invocation of init method failed; nested exception is com.mysql.etools.monitor.pom.UnsupportedAttributeException: 101c6b5b-15eb-49aa-916c-843c51b28d38: mysql.slavestatus.Master_ip
Having too many users with strong privileges generated Service Manager errors and events failed to be triggered.
If there were approximately 1000 users with full privileges and
the value of
group_concat_max_len was set to
100001, the size of the data that the agent sent to the Service
Manager was too large and caused Service Manager errors. Also,
the Security event “Account has Strong MySQL
privileges” did not trigger.
Query Analyzer's Query Type filter for
ignored statements starting with parenthesis.
If you sent a statement through Query Analyzer starting with parenthesis, such as:
(SELECT 1 FROM dual);
and then attempted to filter for
queries only, queries starting with parenthesis were not
The agent angel process was spawning too soon, which caused a duplicate UUID error.
g_error() logged a fatal error, and called
abort(). This terminated the program. Then
the angel respawned with the same UUID, but with a -1 session
resync request, which the MEM server denied because the old
session was still active. This resulted in a permissions denied
error (1142) on the
2008-12-17 18:58:58: (message) agent_mysqld.c:313: [mysql] mysqld is local and directly connected 2008-12-17 18:58:58: ((error)) agent_mysqld.c:444: [mysql] mysql_real_query("SELECT value FROM mysql.inventory WHERE name = 'uuid'") failed: SELECT command denied to user 'ent_agent'@'127.0.0.1' for table 'inventory' (errno=1142) 2008-12-17 18:58:58: (debug) chassis.c:282: 15134 returned: 15134 2008-12-17 18:58:58: (message) chassis.c:304: [angel] PID=15134 died on signal=6 (it used 0 kBytes max) ... waiting 3min before restart 2008-12-17 18:59:00: (debug) chassis.c:244: we are the child: 15149 2008-12-17 18:59:00: (message) chassis.c:259: [angel] we try to keep PID=15149 alive 2008-12-17 18:59:00: (debug) chassis.c:277: waiting for 15149 2008-12-17 18:59:00: (message) mysql-proxy 0.7.0 started 2008-12-17 18:59:00: (message) MySQL Monitor Agent 220.127.116.1111 started.
master_uuid discovery did not work with MySQL
Server versions prior to 5.1.
not show in any Agent to Monitor communications, and no log or
error messages were generated.
However, now the bug has been fixed, an Agent monitoring a 5.0 MySQL Server would register the following in its logs:
... <classname>slavestatus</classname> <instance>12515cdc-8c00-4223-9d2a-2666a403512c</instance> <attribute>Master_uuid</attribute> </target> <utc>2009-03-03T19:58:05.700Z</utc> <value>b2fd9f86-6e42-49f2-b930-e8fb3e728179</value>
Note the presence of
master_uuid was not used for replication
The agent collected
master_uuid by reading
master.info file, and then running a
SELECT directly against its master. This was
to try and read the
mysql.inventory table on
the master to obtain the instance
However, this was not being used correctly by the replication topology discovery within the server. (Bug#41519)
Queries such as
SELECT against the master
mysql.inventory was not logged on slave-based
agents. This made diagnosing topology discovery issues
After an error was generated due to an incorrect password while trying to create a new user, the following error was obtained when subsequently attempting to create a valid new user:
U0002 You must log in to access the requested resource
Agent startup failed on Solaris 10. The error generated was:
# ./mysql-monitor-agent start Bad string ERROR! /opt/mysql/enterprise/agent/etc/mysql-monitor-agent.ini has to have a [mysql-proxy].pid-file setting
This was caused by unexpected behavior of the tr command. (Bug#41260)
On the Query Analysis page, if a query was clicked the minimum displayed was greater than the average. (Bug#41259)
In some circumstances the agent/proxy ran out of file descriptors, causing secondary failures. It could not recover from that state. The relevant part of the log file is shown here:
2008-11-27 11:11:00: (critical) last message repeated 2 times 2008-11-27 11:11:00: (critical) job_collect_os.c:411: sigar_cpu_info_list_get() failed 2008-11-27 11:11:00: (critical) job_collect_os.c:445: sigar_cpu_list_get() failed 2008-11-27 11:11:00: (critical) job_collect_os.c:411: sigar_cpu_info_list_get() failed 2008-11-27 11:11:00: (critical) job_collect_os.c:445: sigar_cpu_list_get() failed 2008-11-27 11:11:00: (critical) job_collect_os.c:411: sigar_cpu_info_list_get() failed 2008-11-27 11:11:00: (critical) job_collect_os.c:445: sigar_cpu_list_get() failed 2008-11-27 11:11:00: (critical) job_collect_os.c:411: sigar_cpu_info_list_get() failed 2008-11-27 11:11:00: (critical) job_collect_os.c:445: sigar_cpu_list_get() failed 2008-11-27 11:11:30: (critical) network-socket.c.292: socket(127.0.0.1:3306) failed: Too many open files (24) 2008-11-27 11:11:30: (critical) proxy-plugin.c.1532: Cannot connect, all backends are down. 2008-11-27 11:20:22: (critical) last message repeated 4 times 2008-11-27 11:20:22: (critical) network-io.c:215: curl_easy_perform('https://user:password@merlin-dashboard:443/heartbeat') failed: SSL connection timeout (curl-error = 'Timeout was reached' (28), os-error = 'Connection refused' (111))
If an installation of Service Manager 18.104.22.16802 included a
backup directory, due to a previous
upgrade, and was upgraded using at least Service Manager
22.214.171.12403, then the installer displayed an error message and
The error message displayed was:
There has been an error. Error renaming /Applications/mysql/enterprise/monitor/apache-tomcat to /Applications/mysql/enterprise/monitor/backup/apache-tomcat The application will exit now
The Agent started without problems and connected to the master.
But it was unable to perform a
mysql.inventory in order to obtain
Canonical Query Text for
Select -1 was
SELECT -? instead of
SELECT ? on the Query Analyzer tab.
The agent installer for Solaris 8 x86 32-bit was missing. (Bug#40248)
The MySQL Enterprise Monitor Dashboard did not display the subscribed notification group(s) on the Advisor Current Scheduled and Add to Schedule pages. (Bug#36007)
The startup scripts supplied with MySQL Network Monitoring and
Advisory tool did not supply all of the LSB
init.d script options required. A list of
the required options can be found at the following website
The required options missing include
force-reload. The option
status is used by monitoring tools and
cluster software such as Red Hat Cluster, to ensure that the
service is still running. The
option is an alias for restart.
Multiple errors showed in the agent log after issuing a
SHOW INNODB STATUS statement. The
InnoDB Buffer Poolgraph also went blank.