Apache EUE file not found

Hi Henk,

Could be that you have to change the path where the agent gets served from.

What web/app server are you using?

Kristof,

Apache httpd deamon on linux, what I see:

httpd  included -> /dtagent61_n_7880.js (so that is ok)

where dynatrace is installed: /opt/dynatrace-6.1.0/agent

file not found: /usr/IBM/HTTPServer/htdocs/dtagent61_n_7880.js

KR Henk

Henk,

So Dynatrace will inject the dtagent.js file into every served web page.

The request to this dtagent.js file will be intercepted by the Dynatrace Apache module and server the file from memory.

However, it could be that the web server does not allow any "unknown" file to be served from the root directory.

If that is the case, it might make sense to change it to a location where it can be served from (eg: where the other static content is)

This can be done in the User Experience section in the profile:

The result is that, in this case, the tag injected in the page will point to "/static/dtagent.js".

Please let me know if that helps.

KR,
Kristof 

Kristof,

Could this be part of the issue?

2015-07-29 05:37:18.006521 [18435/80a25090] warning [native] SharedMemory::attachOrCreate: Could not change the file access permissions of /opt/dynatrace-6.1.0/agent/conf/dynaTraceWebServerSharedMemory to 0666: Operation not permitted

2015-07-29 05:37:18.006558 [18435/80a25090] info    [native] Successfully attached to shared memory file /opt/dynatrace-6.1.0/agent/conf/dynaTraceWebServerSharedMemory

KR Henk

Kristof,

It is a production environment, so I can not modify on the live system. However I have a identical twin who has no problems, httpd.conf of both systems are identical,

KR Henk

Hi Henk,

This looks like a different issue.

It seems that there is a file permission issue to the shared memory segment.

Please check here for more information: Apache Web Server Agent Configuration#DeploymentandFileAccessPermissions  

Make sure that the user launching the web server agent and apache processes has the correct permission set to change the access levels.

Kristof,

To make it more interesting, I have two web servers, the permissions are exactly the same. Still one works, and the other gives the file not found error on the script. The owner of the Dynatrace file tree is root/root n both systems. So the rights of the user running Apache must be the issue?

KR Henk

Is SELinux turned on by any chance on the one that is not working as expected?

Can below be a problem?

Unconfined domains (as well as confined domains) are subject to executable and writeable memory checks. By default, subjects running in an unconfined domain cannot allocate writeable memory and execute it,

KR Henk Stobbe

My understanding is while in permissive mode, everything should be allowed but audited, which allows for the use of "audit2allow" to create a module for when enforcing is turned on.  If you need a module later, here is another post that has one that should help:

SELinux Agent Install

But since you are the original poster on that thread, you probably had already seen it!

HTH,

dave