Transaction is truncated because PHP Fiber use is detected spammed

[matthiaz]

Description

Since newrelic agent 12.6.0.34 a new warning was added to indicate when newrelic detect PHP Fiber.
This was added in #1178

web@app.0:~$ newrelic-daemon -v
New Relic daemon version 12.6.0.34-6a97c7f2e19b
(C) Copyright 2009-2019 New Relic Inc. All rights reserved.

While I understand why this is being done, do we really need to spam this warning on every request that comes in? Seems a bit much...

Seems to be coming from: https://github.com/newrelic/newrelic-php-agent/pull/1178/changes#diff-232e572accbc970d0d144c32504e4aa04a13d37578762968fde594964bb91625R138

Steps to Reproduce

Have a project that uses PHPFiber . Which would include a Drupal application: https://www.drupal.org/node/3392011
PHP Fibers support has been added to Drupal's default and Big Pipe rendering systems.

Expected Behavior

Don't throw a warning. Just silently don't do the transaction.

Relevant Logs / Console output

web@app.0:~$ tail -f /var/log/app.log 
2026-04-14 07:51:25.856 +0000 (14739 14739) warning: Transaction is truncated because PHP Fiber use is detected.
2026-04-14 07:51:29.666 +0000 (14762 14762) warning: Transaction is truncated because PHP Fiber use is detected.
2026-04-14 07:51:33.718 +0000 (14739 14739) warning: Transaction is truncated because PHP Fiber use is detected.
2026-04-14 07:51:41.784 +0000 (14756 14756) warning: Transaction is truncated because PHP Fiber use is detected.
2026-04-14 07:51:42.036 +0000 (14740 14740) warning: Transaction is truncated because PHP Fiber use is detected.
2026-04-14 07:51:45.204 +0000 (14756 14756) warning: Transaction is truncated because PHP Fiber use is detected.
2026-04-14 07:51:45.229 +0000 (14739 14739) warning: Transaction is truncated because PHP Fiber use is detected.
2026-04-14 07:51:49.392 +0000 (14756 14756) warning: Transaction is truncated because PHP Fiber use is detected.
2026-04-14 07:51:53.938 +0000 (14739 14739) warning: Transaction is truncated because PHP Fiber use is detected.
2026-04-14 07:51:58.153 +0000 (14740 14740) warning: Transaction is truncated because PHP Fiber use is detected.

Your Environment

web@app.0:~$ newrelic-daemon -v
New Relic daemon version 12.6.0.34-6a97c7f2e19b
(C) Copyright 2009-2019 New Relic Inc. All rights reserved.

Debian 12.13

[newrelic-php-agent-bot]

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[liberatr]

I am seeing similar messages on a recent Drupal release.

[hahuja2]

Fixed in 12.7 release.