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fix: gracefully handle missing diagChannel.tracingChannel on Node < 18.19 - #2290

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aryamohanan:fix-tracingchannel
Sep 20, 2025
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fix: gracefully handle missing diagChannel.tracingChannel on Node < 18.19#2290
mcollina merged 2 commits into
pinojs:mainfrom
aryamohanan:fix-tracingchannel

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@aryamohanan

@aryamohanan aryamohanan commented Sep 19, 2025

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This PR fixes a compatibility issue when running Pino on Node.js 18.x versions earlier than 18.19, where diagnostics_channel.tracingChannel is not available.

Problem

In Node 18.18 and earlier, diagChannel.tracingChannel does not exist. This caused Pino’s asJson tracing logic to throw an error at runtime.

Solution

  • Added feature detection for diagChannel.tracingChannel.

  • When unavailable, provide a minimal no-op fallback:

    • hasSubscribers: false
    • traceSync() simply calls the provided function

  • Ensures asJson works normally, even without tracing support.

Notes

  • Added inline comments to clarify that tracingChannel is available starting with Node 18.19+.
  • Kept the fallback implementation minimal to avoid performance impact.

Reference

This issue was added in the latest Pino release, #2281 and diagnostics_channel.tracingChannel was introduced in Node.js starting from v18.19 (see Node.js docs).

closes #2289

@aryamohanan aryamohanan changed the title fix: provide fallback for diagChannel.tracingChannel in older node versions fix: gracefully handle missing diagChannel.tracingChannel on Node < 18.19 Sep 19, 2025
mcollina
mcollina requested changes Sep 19, 2025
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Please add Node 18.18 to CI.

mcollina
mcollina approved these changes Sep 19, 2025
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lgtm

@mcollina

mcollina commented Sep 20, 2025

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cc @jsumners

@aryamohanan

aryamohanan commented Sep 20, 2025

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@mcollina I tested this on macOS with Node.js v20, and it passed. Could this be a flaky test in CI? Would it be possible to rerun the test?

jsumners
jsumners reviewed Sep 20, 2025
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I'm not going to block this fair solution. But my opinion is that it is just adding stuff to remove for the next major (which is long overdue and something I hope to get done soon). I think we are clear that we only support the most current release in each release line, and v18.19 wasn't even the most current v18 (there were two releases of .19 and 9 releases of v18.20).

@mcollina
mcollina merged commit 991a5f9 into pinojs:main Sep 20, 2025
37 of 41 checks passed
alanplatt added a commit to DEFRA/grants-ui that referenced this pull request Nov 7, 2025
@alanplatt
[Snyk] Upgrade pino from 9.9.5 to 9.11.0 (#374)
d276116 
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<h3>Snyk has created this PR to upgrade pino from 9.9.5 to 9.11.0.</h3>

:information_source: Keep your dependencies up-to-date. This makes it
easier to fix existing vulnerabilities and to more quickly identify and
fix newly disclosed vulnerabilities when they affect your project.

<hr/>


- The recommended version is **2 versions** ahead of your current
version.

- The recommended version was released **24 days ago**.




<details>
<summary><b>Release notes</b></summary>
<br/>
  <details>
    <summary>Package name: <b>pino</b></summary>
    <ul>
      <li>
<b>9.11.0</b> - <a
href="https://redirect.github.com/pinojs/pino/releases/tag/v9.11.0">2025-09-20</a></br><h2>What's
Changed</h2>
<ul>
<li>feat: added timestamp rfc3339 format with nanoseconds by <a
class="user-mention notranslate" data-hovercard-type="user"
data-hovercard-url="/users/edge33/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://redirect.github.com/edge33">@ edge33</a> in <a
class="issue-link js-issue-link" data-error-text="Failed to load title"
data-id="3288586845" data-permission-text="Title is private"
data-url="pinojs/pino#2251"
data-hovercard-type="pull_request"
data-hovercard-url="/pinojs/pino/pull/2251/hovercard"
href="https://redirect.github.com/pinojs/pino/pull/2251">#2251</a></li>
<li>fix: gracefully handle missing diagChannel.tracingChannel on Node
&lt; 18.19 by <a class="user-mention notranslate"
data-hovercard-type="user"
data-hovercard-url="/users/aryamohanan/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://redirect.github.com/aryamohanan">@ aryamohanan</a> in <a
class="issue-link js-issue-link" data-error-text="Failed to load title"
data-id="3433786084" data-permission-text="Title is private"
data-url="pinojs/pino#2290"
data-hovercard-type="pull_request"
data-hovercard-url="/pinojs/pino/pull/2290/hovercard"
href="https://redirect.github.com/pinojs/pino/pull/2290">#2290</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a class="user-mention notranslate" data-hovercard-type="user"
data-hovercard-url="/users/edge33/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://redirect.github.com/edge33">@ edge33</a> made their first
contribution in <a class="issue-link js-issue-link"
data-error-text="Failed to load title" data-id="3288586845"
data-permission-text="Title is private"
data-url="pinojs/pino#2251"
data-hovercard-type="pull_request"
data-hovercard-url="/pinojs/pino/pull/2251/hovercard"
href="https://redirect.github.com/pinojs/pino/pull/2251">#2251</a></li>
<li><a class="user-mention notranslate" data-hovercard-type="user"
data-hovercard-url="/users/aryamohanan/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://redirect.github.com/aryamohanan">@ aryamohanan</a> made
their first contribution in <a class="issue-link js-issue-link"
data-error-text="Failed to load title" data-id="3433786084"
data-permission-text="Title is private"
data-url="pinojs/pino#2290"
data-hovercard-type="pull_request"
data-hovercard-url="/pinojs/pino/pull/2290/hovercard"
href="https://redirect.github.com/pinojs/pino/pull/2290">#2290</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a class="commit-link"
href="https://redirect.github.com/pinojs/pino/compare/v9.10.0...v9.11.0"><tt>v9.10.0...v9.11.0</tt></a></p>
      </li>
      <li>
<b>9.10.0</b> - <a
href="https://redirect.github.com/pinojs/pino/releases/tag/v9.10.0">2025-09-17</a></br><h2>What's
Changed</h2>
<ul>
<li>docs: Move pino-logflare out of legacy transports list by <a
class="user-mention notranslate" data-hovercard-type="user"
data-hovercard-url="/users/kamilogorek/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://redirect.github.com/kamilogorek">@ kamilogorek</a> in <a
class="issue-link js-issue-link" data-error-text="Failed to load title"
data-id="3406229630" data-permission-text="Title is private"
data-url="pinojs/pino#2283"
data-hovercard-type="pull_request"
data-hovercard-url="/pinojs/pino/pull/2283/hovercard"
href="https://redirect.github.com/pinojs/pino/pull/2283">#2283</a></li>
<li>Add support for <code>Pear</code> and <code>Bare</code> runtimes by
<a class="user-mention notranslate" data-hovercard-type="user"
data-hovercard-url="/users/yassernasc/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://redirect.github.com/yassernasc">@ yassernasc</a> in <a
class="issue-link js-issue-link" data-error-text="Failed to load title"
data-id="3388452783" data-permission-text="Title is private"
data-url="pinojs/pino#2278"
data-hovercard-type="pull_request"
data-hovercard-url="/pinojs/pino/pull/2278/hovercard"
href="https://redirect.github.com/pinojs/pino/pull/2278">#2278</a></li>
<li>Add tracing channels by <a class="user-mention notranslate"
data-hovercard-type="user"
data-hovercard-url="/users/jsumners-nr/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://redirect.github.com/jsumners-nr">@ jsumners-nr</a> in <a
class="issue-link js-issue-link" data-error-text="Failed to load title"
data-id="3402802217" data-permission-text="Title is private"
data-url="pinojs/pino#2281"
data-hovercard-type="pull_request"
data-hovercard-url="/pinojs/pino/pull/2281/hovercard"
href="https://redirect.github.com/pinojs/pino/pull/2281">#2281</a></li>
<li>Add pino-console to ecoystem page by <a class="user-mention
notranslate" data-hovercard-type="user"
data-hovercard-url="/users/mcollina/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://redirect.github.com/mcollina">@ mcollina</a> in <a
class="issue-link js-issue-link" data-error-text="Failed to load title"
data-id="3426535226" data-permission-text="Title is private"
data-url="pinojs/pino#2288"
data-hovercard-type="pull_request"
data-hovercard-url="/pinojs/pino/pull/2288/hovercard"
href="https://redirect.github.com/pinojs/pino/pull/2288">#2288</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a class="user-mention notranslate" data-hovercard-type="user"
data-hovercard-url="/users/kamilogorek/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://redirect.github.com/kamilogorek">@ kamilogorek</a> made
their first contribution in <a class="issue-link js-issue-link"
data-error-text="Failed to load title" data-id="3406229630"
data-permission-text="Title is private"
data-url="pinojs/pino#2283"
data-hovercard-type="pull_request"
data-hovercard-url="/pinojs/pino/pull/2283/hovercard"
href="https://redirect.github.com/pinojs/pino/pull/2283">#2283</a></li>
<li><a class="user-mention notranslate" data-hovercard-type="user"
data-hovercard-url="/users/yassernasc/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://redirect.github.com/yassernasc">@ yassernasc</a> made
their first contribution in <a class="issue-link js-issue-link"
data-error-text="Failed to load title" data-id="3388452783"
data-permission-text="Title is private"
data-url="pinojs/pino#2278"
data-hovercard-type="pull_request"
data-hovercard-url="/pinojs/pino/pull/2278/hovercard"
href="https://redirect.github.com/pinojs/pino/pull/2278">#2278</a></li>
<li><a class="user-mention notranslate" data-hovercard-type="user"
data-hovercard-url="/users/jsumners-nr/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://redirect.github.com/jsumners-nr">@ jsumners-nr</a> made
their first contribution in <a class="issue-link js-issue-link"
data-error-text="Failed to load title" data-id="3402802217"
data-permission-text="Title is private"
data-url="pinojs/pino#2281"
data-hovercard-type="pull_request"
data-hovercard-url="/pinojs/pino/pull/2281/hovercard"
href="https://redirect.github.com/pinojs/pino/pull/2281">#2281</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a class="commit-link"
href="https://redirect.github.com/pinojs/pino/compare/v9.9.5...v9.10.0"><tt>v9.9.5...v9.10.0</tt></a></p>
      </li>
      <li>
<b>9.9.5</b> - <a
href="https://redirect.github.com/pinojs/pino/releases/tag/v9.9.5">2025-09-10</a></br><h2>What's
Changed</h2>
<ul>
<li>fix: allow object type in %s placeholder by <a class="user-mention
notranslate" data-hovercard-type="user"
data-hovercard-url="/users/mcollina/hovercard"
data-octo-click="hovercard-link-click"
data-octo-dimensions="link_type:self"
href="https://redirect.github.com/mcollina">@ mcollina</a> in <a
class="issue-link js-issue-link" data-error-text="Failed to load title"
data-id="3388093159" data-permission-text="Title is private"
data-url="pinojs/pino#2277"
data-hovercard-type="pull_request"
data-hovercard-url="/pinojs/pino/pull/2277/hovercard"
href="https://redirect.github.com/pinojs/pino/pull/2277">#2277</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a class="commit-link"
href="https://redirect.github.com/pinojs/pino/compare/v9.9.4...v9.9.5"><tt>v9.9.4...v9.9.5</tt></a></p>
      </li>
    </ul>
from <a href="https://redirect.github.com/pinojs/pino/releases">pino
GitHub release notes</a>
  </details>
</details>

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pino@9.10.0 breaks on Node v18.18 due to missing diagnostics_channel.tracingChannel

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