Splunk Search

文字の多いイベントに対し、REGEXが正しく処理されない

cwl
Contributor

イベントをインデックスする前に特定のフィールドの内容を transforms.conf 内の REGEX で加工しているが、4500適度(かそれ以上)の文字のイベントに対し、REGEXで指定した正規表現が正しく処理されない。

0 Karma
1 Solution

cwl
Contributor

transforms.conf 内の REGEX はデフォルトで 4096 文字までしか処理しません。4096 以上の文字を処理したい場合、transforms.conf に LOOKAHEAD を追加し、文字数を指定する必要があります。

http://docs.splunk.com/Documentation/Splunk/latest/Admin/Transformsconf

LOOKAHEAD = <integer>
* NOTE: This option is only valid for index-time field extractions.
* Optional. Specifies how many characters to search into an event.
* Defaults to 4096. You may want to increase this value if you have event line lengths that
exceed 4096 characters (before linebreaking).

View solution in original post

0 Karma

cwl
Contributor

transforms.conf 内の REGEX はデフォルトで 4096 文字までしか処理しません。4096 以上の文字を処理したい場合、transforms.conf に LOOKAHEAD を追加し、文字数を指定する必要があります。

http://docs.splunk.com/Documentation/Splunk/latest/Admin/Transformsconf

LOOKAHEAD = <integer>
* NOTE: This option is only valid for index-time field extractions.
* Optional. Specifies how many characters to search into an event.
* Defaults to 4096. You may want to increase this value if you have event line lengths that
exceed 4096 characters (before linebreaking).

0 Karma
Get Updates on the Splunk Community!

.conf25 Community Recap

Hello Splunkers, And just like that, .conf25 is in the books! What an incredible few days — full of learning, ...

Splunk App Developers | .conf25 Recap & What’s Next

If you stopped by the Builder Bar at .conf25 this year, thank you! The retro tech beer garden vibes were ...

Congratulations to the 2025-2026 SplunkTrust!

Hello, Splunk Community! We are beyond thrilled to announce our newest group of SplunkTrust members!  The ...