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[Helen Drewski]

I created a field extractor for different fields for an event. Now I would like to search all the events from a source and apply that field extractor to see the fields that I'm interested in. The field extractor seems to appear, but I don't know how to apply that into my search. I've tried REPORT- but no luck. How can I apply a field extractor already created into a search ?

Now, in 2024, 7 years later it is still not very clear how one applies a saved extraction regex to an existing search to extract fields from the search. Especially without access to the various server side configuration files. Splunk has grown long in the tooth, dementia encroaching.

Reality: You probably can't do it simply.

If you have a sourcetype X. The extractors you saved will only run against the base, plain data set sent as X, not against your search, and they run against the base sourcetype automatically. If it was going to work, it would already be working and you would already have your field.

Now, if your search does any kind of transformations like for example pulling log fields out of JSON data using spath, messing around with _raw or similar, the extractor you created isn't going to run against that resulting data set. I know, I've tried. The extractors get applied before that part of the search runs.

You're going to have to go into Settings -> Fields -> Field Extractions and copy/paste the regex created by the web extractor page into your search and manually extract the field within your search using the "rex" command. You may have to tweak it slightly especially for quotes.

It's a little disingenuous of the splunk web extraction generator to take the results of the current search as the input and imply that a saved extractor will actually operate against such a search and pull fields out for you. It doesn't.

Not a useful answer. The question concerned a field extractor, not a transform. Are you implying that the ONLY way Splunk can use a field-extractor is to first create a transform? Pity, since that seems beyond the scope of an ordinary user.

it cannot be done. Splunk is stupid and non-intuitive or maybe they want to sell professional services like ITRS does,it cannot be done the way you want it. you have to plunk down the regex in its entirety.
Splunk is stupid and non-intuitive or maybe they want to sell professional services like ITRS does

Each field extraction is applied to a sourcetype generally. The extractions are only going to work on the sourcetypes they've been setup for, and only in the apps they've been configured in (unless the extraction is set to global sharing), and only for those users who have read permission on the app they are found in.

I have the same issue here. And I cannot access the transforms.conf file (or the server's file system at all) to get the Stanza of my field extractor.
In the Splunk Web-UI in the field extractions overview, the name of my field extractor is like my_sourcetype : EXTRACT-my_new_field.
Is there any other way to derive the Stanza through the Splunk Web-UI?

since you have an EXTRACT option configured there is no transforms.conf stanza linked.
An example for a REPORT option is the default field extraction of splunk_web_access which you can see using this URI:

Your answer from 2020 was very unclear, less clear than the documentation. OK, so here goes: Splunk provides a fascinating way to search and report on log data, and promises simplicity in various use-cases. One (would think) extremely common use-case is for users in the enterprise edition to create custom regular expressions in order to extract values from select log lines, and then do various things with those extracted values.

The documentation and GUI lead one to think one can create a python-perl extended regex to extract such fields. However, instead of then being able to _use_ such a regex, the user must _save_ it somehow with a name. And then the documentation goes off in the weeds without any explanation as to how to _use_ such saved extractions.

There's lots of discussion about props.conf and transforms.conf, but this appears to predate the enterprise edition, in which ordinary users do not have such godlike powers over a centralized, enteprise splunk deployment.

So as simply as possible, please tell me what additional steps an ordinary user within an Splunk enterprise deploymnet must take in order to create searches and then later reports and alerts using saved field-extractions.

it keeps getting me these error:

Error in 'extract' command: Failed to parse the key-value pair configuration for transform 'MYFIELD'.

Do you possibly have in mind what it could be ? I'm kinda trapped on it for a few days

I'm even more late to the party, but am running in somewhat of a similar situation. I have new data coming in via syslog, but no fields are auto extracted. So, I'm using REPORT to extract them. I have the stanza ready, but I placed it in the Heavy forwarder by mistake. Should I place it in the props on the search head or the Indexer for the change to work.

I've found many times the image-package-extractor is unable to extract packages from some images I'm running because the daemon set creates the pods with 50MB of memory request, and the same ammount for it's limits.

kubectl edit ds image-package-extractor --namespace=kube-system
error: daemonsets.apps "image-package-extractor" could not be patched: daemonsets.apps "image-package-extractor" is forbidden: User "jk" cannot patch resource "daemonsets" in API group "apps" in the namespace "kube-system": GKE Warden authz [denied by managed-namespaces-limitation]: the namespace "kube-system" is managed and the request's verb "patch" is denied

kubectl replace -f /tmp/kubectl-edit-751860510.yaml
Error from server (Forbidden): error when replacing "/tmp/kubectl-edit-751860510.yaml": daemonsets.apps "image-package-extractor" is forbidden: User "jk" cannot update resource "daemonsets" in API group "apps" in the namespace "kube-system": GKE Warden authz [denied by managed-namespaces-limitation]: the namespace "kube-system" is managed and the request's verb "update" is denied

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Press on the red trigger and clean with a back and forth motion to cover a section of the furniture you are cleaning. Like when using the extractor, release the trigger and continue passing over the space to suction up dirty water. Like with the regular extractor you should not over saturate any single area.

An extractor object is an object with an unapply method. Whereas the apply method is like a constructor which takes arguments and creates an object, the unapply takes an object and tries to give back the arguments. This is most often used in pattern matching and partial functions.

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Path provides information that is extracted from the request's path. Parts of the path that are extractable are called "dynamic segments" and are marked with curly braces. You can deserialize any variable segment from the path.

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