Unable to reproduce, please specify more precisely steps to reproduce the problem.

If I change any field in system-tab or system-inventary-tab of any host - all trigger-dependencies of foreign-hosts only will be removed. Trigger-dependencies which belongs to the same host were not touched/removed.

Where do you find "system" or "system-inventory" tab? What you mean by "foreign-host"?
If possible please specify step by step instruction to reproduce the problem.

sorry, german translation in frontend differs sometimes...
just replace system and system-inventory into host and host-inventory, which are both placed at "configuration | hosts".

With trigger-dependencies of foreign-hosts i mean dependencies which doesn't belong to the same host but to another host.

Still unable to reproduce:

create host "h1"
create item "i1" on "h1"
create trigger "t1" on "h1"
create host "h2"
create item "i2" on "h2"
create trigger "t2" on "h2"
add dependency to trigger "t2" from trigger "t1"
change Host Inventory field "type" to "abc"

dependencies are not lost

Export attached.

ok, we're getting closer to the problem...

Dependencies are only not lost, if the item is created in this host. If the item/trigger is based on a template, it will be still removed after updating any host inventory field.

now I see the problem

Fixed in dev. branch: svn://svn.zabbix.com/branches/dev/ZBX-5086

(1) I have a template linked to a host with two triggers and a dependency between them. When I update the host, I get the following error:

Error in query [INSERT INTO trigger_depends (triggerid_down,triggerid_up,triggerdepid) VALUES ('100100000013823','100100000013816',100100000000575)] [Duplicate entry '100100000013823-100100000013816' for key 2]
SQL statement execution has failed "INSERT INTO trigger_depends (triggerid_down,triggerid_up,triggerdepid) VALUES ('100100000013823','100100000013816',100100000000575)". [CHost.update -> CHost.massUpdate -> CHost.massAdd -> CTemplate.massAdd -> CTemplate.link -> CTrigger.syncTemplateDependencies -> CTrigger.addDependencies -> DB.insert]

<Toms> unable to reproduce the error, please attach simple export for this case.

<pavels> Yeah, looks like it's a bit more complex to reproduce. See zbx_export_templates(2).xml for the template and zbx_export_hosts(4).xml for the host. After the import, try to update the dep-host.

<Toms> CLOSED

(2) Currently it's not a good idea, to add second arguments to public methods. I think we can introduce a private deleteTemplatedDependencies method to delete the corresponding dependencies.

<Toms> CLOSED

Started everything from scratch.

(1) Why is the $graph parameter in CTemplate::checkCircularAndDoubleLinkage passed as reference? Btw, I've corrected some code formatting issues in r28785.

<Toms> CLOSED As we discussed, we don't want to use reference for performance. Removed reference.

TESTED, but please close (1) before merging.

Fixed in 2.0.1rc1 r28794, 2.1.0 r28795