Zabbix Documentation 2.4

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 [2018/12/06 06:30] (current)
martins-v some rewording
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 +==== 6 Known issues ====
  
 +=== Problems with pressing Enter in configuration forms ===
 +
 +Pressing Enter in a text field of a configuration form is known to result in various problems.
 +
 +For instance, if you open the configuration form of a host with linked templates, then press Enter in any text field and update the form, template linkage is removed (items from the template remain).
 +
 +=== IPMI checks ===
 +
 +IPMI checks will not work with the standard OpenIPMI library from Debian/​Ubuntu package. To fix, 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.
 +
 +=== HTTPS checks ===
 +
 +Web scenarios using the https protocol and Zabbix agent checks ''​net.tcp.service[https...]''​ and ''​net.tcp.service.perf[https...]''​ may fail if the target server is configured to disallow TLS v1.0 protocol or below. ​ Please see  [[https://​support.zabbix.com/​browse/​ZBX-9879|ZBX-9879]] for more information and available workarounds.
 +
 +=== 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.
 +
 +=== 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.
 +
 +=== Web monitoring ===
 +
 +Zabbix server leaks memory on CentOS 6, CentOS 7 and possibly other related Linux distributions due to an [[https://​bugzilla.redhat.com/​show_bug.cgi?​id=1057388|upstream bug]] when "SSL verify peer" is enabled in web scenarios. Please see [[https://​support.zabbix.com/​browse/​ZBX-10486|ZBX-10486]] for more information and available workarounds.
 +
 +=== Slow MySQL queries ===
 +
 +Zabbix server generates 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]].