Zabbix Documentation 2.2

2.23.04.04.2 (current)In development:4.4 (devel)Unsupported:1.82.02.43.23.4

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manual:installation:known_issues

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manual:installation:known_issues [2019/03/12 12:47]
manual:installation:known_issues [2019/04/18 09:00] (current)
martins-v flipping frontend locales
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 +==== 6 Known issues ====
  
 +=== Agent items ===
 +
 +  * ''​net.dns[]''​ Zabbix agent [[:​manual/​config/​items/​itemtypes/​zabbix_agent|item]] does not support IPv6 addresses in its first parameter.
 +
 +=== IPMI checks ===
 +
 +IPMI checks will not work with the standard OpenIPMI library package on Debian prior to 9 (stretch) and Ubuntu prior to 16.04 (xenial). To fix that, recompile OpenIPMI library with OpenSSL enabled as discussed in [[https://​support.zabbix.com/​browse/​ZBX-6139|ZBX-6139]].
 +
 +=== SSH checks ===
 +
 +Some Linux distributions like Debian, Ubuntu do not support encrypted private keys (with passphrase) if the libssh2 library is installed from packages. Please see  [[https://​support.zabbix.com/​browse/​ZBX-4850|ZBX-4850]] for more details.
 +
 +=== ODBC checks ===
 +
 +Zabbix server or proxy that uses MySQL as its database may or may not work correctly with MySQL ODBC library due to an [[https://​bugs.mysql.com/​bug.php?​id=73709|upstream bug]]. Please see  [[https://​support.zabbix.com/​browse/​ZBX-7665|ZBX-7665]] for more information and available workarounds.
 +
 +=== Simple checks ===
 +
 +There is a bug in **fping** versions earlier than v3.10 that mishandles duplicate echo replay packets. This may cause unexpected results for ''​icmpping'',​ ''​icmppingloss'',​ ''​icmppingsec''​ items. It is recommended to use the latest version of **fping**. Please see  [[https://​support.zabbix.com/​browse/​ZBX-11726|ZBX-11726]] for more details.
 +
 +=== SNMP checks ===
 +
 +If the OpenBSD operating system is used, a use-after-free bug in the Net-SNMP library up to the 5.7.3 version can cause a crash of Zabbix server if the SourceIP parameter is set in the Zabbix server configuration file. As a workaround, please do not set the SourceIP parameter. The same problem applies also for Linux, but it does not cause Zabbix server to stop working.
 +A local patch for the net-snmp package on OpenBSD was applied and will be released with OpenBSD 6.3.
 +
 +=== Flipping frontend locales ===
 +
 +It has been observed that frontend locales may flip without apparent logic. A known workaround to this is to disable multithreading in PHP and Apache. Please see  [[https://​support.zabbix.com/​browse/​ZBX-10911|ZBX-10911]] for more information.
 +
 +=== Slow MySQL queries ===
 +
 +Zabbix server may generate slow select queries in case of non-existing values for items. This is caused by a known [[https://​bugs.mysql.com/​bug.php?​id=74602|issue]] in MySQL 5.6/5.7 versions. A workaround to this is disabling the index_condition_pushdown optimizer in MySQL. For an extended discussion, see [[https://​support.zabbix.com/​browse/​ZBX-10652|ZBX-10652]].
 +
 +=== Escalations ===
 +Several operations can be assigned to the same step. If these operations have different step duration defined, the shortest one is taken into account and applied to the step.
 +But due to bug there was exception to this rule when step duration is set to 0, it would use default value instead of shortest one.
 +Now there will be no exception and default step duration will only be used if it's shortest, this is equivalent to behavior that frontend shows and user expects.
 +Affects all versions, fixed in 2.2.17rc1, (see [[https://​support.zabbix.com/​browse/​ZBX-11534|ZBX-11534]] for more information).
 +
 +=== API login ===
 +
 +A large number of open user sessions can be created when using custom scripts with the ''​user.login''​ [[:​manual/​api/​reference/​user/​login|method]] without a following ''​user.logout''​.
 +
 +=== IPv6 address issue in SNMPv3 traps ===
 +
 +Due to a net-snmp bug, IPv6 address may not be correctly displayed when using SNMPv3 in SNMP traps. For more details and a possible workaround, see [[https://​support.zabbix.com/​browse/​ZBX-14541|ZBX-14541]].
 +
 +=== Known issues for 2.2.0 ===
 +
 +  * Long host or host group names, when selected, may overflow the target field (for example, in the item filter).
 +
 +=== Known issues for 2.2.0 - 2.2.1 ===
 +
 +  * LDAP authetication bind password, once stored in the database, was accessible to Zabbix Super Admin level users in clear text in HTML source code. Fixed for 2.2.2, by hiding the password from clear view.
 +
 +=== Known issues for 2.2.2 ===
 +
 +  * In certain cases it was not possible to add a trigger expression using the expression constructor. Fixed for 2.2.3.
 +
 +=== Known issues for 2.2.3 ===
 +
 +  * ''​logrt[]''​ item processing is broken in Zabbix agent (see [[https://​support.zabbix.com/​browse/​ZBX-8238|ZBX-8238]] for more information). As a workaround use Zabbix agent 2.2.2 on hosts with ''​logrt[]''​ items or apply a [[https://​support.zabbix.com/​secure/​attachment/​28385/​zbx-8238-2.2.3.patch|patch]]. The problem does not affect 2.2.3 server/​proxy.
 +
 +=== Known issues for 2.2.4 and later ===
 +
 +  * ''​log[]''​ and ''​logrt[]''​ items repeatedly reread log file from the beginning if file system is 100% full and the log file is being appended (see [[https://​support.zabbix.com/​browse/​ZBX-10884|ZBX-10884]] for more information).