[🐛 Bug]: CDP NetworkInterceptor warning when reading request body/contents

[MichailiK]

What happened?

Whenever the request contents of a request gets read, a warning message gets logged, which can be pretty huge, as it dumps the entire request, including headers & contents. For my usage, this doesn't seem to be causing any actual issues though.

How can we reproduce the issue?

See repository for a simple'ish example: https://github.com/MichailiK/NetworkInterceptorBug

(Build the project using mvn package, then run using java -jar target/NetworkInterceptorBug-1.0-SNAPSHOT-All.jar)

The repro is inconsistent & may require several runs. I believe this is a race condition.

If I had a semi-educated guess on what is going on: Because I am closing the network interceptor right after I receive the needed request body, Selenium may disable the Fetch domain before its entirely done processing (?) the last intercepted request.

Relevant log output

Log output

Jan 26, 2025 1:57:36 PM org.openqa.selenium.devtools.Connection$Listener lambda$onText$0
WARNING: Unable to process: {"method":"Fetch.requestPaused","params":{"requestId":"interception-job-4.0","request":{"url":"http://localhost:8080/favicon.ico","method":"GET","headers":{"Accept":"image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8","Referer":"http://localhost:8080/api/register","User-Agent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36","sec-ch-ua":"\"Not A(Brand\";v=\"8\", \"Chromium\";v=\"132\"","sec-ch-ua-mobile":"?0","sec-ch-ua-platform":"\"Linux\""},"initialPriority":"High","referrerPolicy":"strict-origin-when-cross-origin"},"frameId":"8428DA1E9F7D2E8145B16B07CD404D69","resourceType":"Other"},"sessionId":"38CE9D37707C4427FA42B5B89B0CC98F"}
org.openqa.selenium.devtools.DevToolsException: {"id":16,"error":{"code":-32000,"message":"Fetch domain is not enabled"},"sessionId":"38CE9D37707C4427FA42B5B89B0CC98F"}
Build info: version: '4.28.0', revision: 'ac342546e9'
System info: os.name: 'Linux', os.arch: 'amd64', os.version: '6.6.52', java.version: '17.0.13'
Driver info: driver.version: unknown
        at org.openqa.selenium.devtools.Connection.sendAndWait(Connection.java:195)
        at org.openqa.selenium.devtools.DevTools.send(DevTools.java:94)
        at org.openqa.selenium.devtools.DevTools.send(DevTools.java:89)
        at org.openqa.selenium.devtools.idealized.Network.lambda$prepareToInterceptTraffic$4(Network.java:236)
        at org.openqa.selenium.remote.http.Filter.lambda$andFinally$1(Filter.java:55)
        at org.openqa.selenium.devtools.idealized.Network.lambda$prepareToInterceptTraffic$5(Network.java:264)
        at org.openqa.selenium.devtools.DevTools.lambda$addListener$0(DevTools.java:108)
        at org.openqa.selenium.devtools.Connection.lambda$handle$5(Connection.java:348)
        at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
        at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179)
        at java.base/java.util.stream.ReferencePipeline$15$1.accept(ReferencePipeline.java:541)
        at java.base/java.util.HashMap$EntrySpliterator.forEachRemaining(HashMap.java:1850)
        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
        at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
        at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
        at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
        at org.openqa.selenium.devtools.Connection.handle(Connection.java:311)
        at org.openqa.selenium.devtools.Connection$Listener.lambda$onText$0(Connection.java:239)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: org.openqa.selenium.WebDriverException: {"id":16,"error":{"code":-32000,"message":"Fetch domain is not enabled"},"sessionId":"38CE9D37707C4427FA42B5B89B0CC98F"}
Build info: version: '4.28.0', revision: 'ac342546e9'
System info: os.name: 'Linux', os.arch: 'amd64', os.version: '6.6.52', java.version: '17.0.13'
Driver info: driver.version: unknown
        at org.openqa.selenium.devtools.Connection.handle(Connection.java:275)
        ... 4 more

Exception in thread "CDP Connection" org.openqa.selenium.devtools.DevToolsException: {"id":16,"error":{"code":-32000,"message":"Fetch domain is not enabled"},"sessionId":"38CE9D37707C4427FA42B5B89B0CC98F"}
Build info: version: '4.28.0', revision: 'ac342546e9'
System info: os.name: 'Linux', os.arch: 'amd64', os.version: '6.6.52', java.version: '17.0.13'
Driver info: driver.version: unknown
        at org.openqa.selenium.devtools.Connection$Listener.lambda$onText$0(Connection.java:242)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: org.openqa.selenium.devtools.DevToolsException: {"id":16,"error":{"code":-32000,"message":"Fetch domain is not enabled"},"sessionId":"38CE9D37707C4427FA42B5B89B0CC98F"}
Build info: version: '4.28.0', revision: 'ac342546e9'
System info: os.name: 'Linux', os.arch: 'amd64', os.version: '6.6.52', java.version: '17.0.13'
Driver info: driver.version: unknown
        at org.openqa.selenium.devtools.Connection.sendAndWait(Connection.java:195)
        at org.openqa.selenium.devtools.DevTools.send(DevTools.java:94)
        at org.openqa.selenium.devtools.DevTools.send(DevTools.java:89)
        at org.openqa.selenium.devtools.idealized.Network.lambda$prepareToInterceptTraffic$4(Network.java:236)
        at org.openqa.selenium.remote.http.Filter.lambda$andFinally$1(Filter.java:55)
        at org.openqa.selenium.devtools.idealized.Network.lambda$prepareToInterceptTraffic$5(Network.java:264)
        at org.openqa.selenium.devtools.DevTools.lambda$addListener$0(DevTools.java:108)
        at org.openqa.selenium.devtools.Connection.lambda$handle$5(Connection.java:348)
        at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
        at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179)
        at java.base/java.util.stream.ReferencePipeline$15$1.accept(ReferencePipeline.java:541)
        at java.base/java.util.HashMap$EntrySpliterator.forEachRemaining(HashMap.java:1850)
        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
        at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
        at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
        at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
        at org.openqa.selenium.devtools.Connection.handle(Connection.java:311)
        at org.openqa.selenium.devtools.Connection$Listener.lambda$onText$0(Connection.java:239)
        ... 3 more
Caused by: org.openqa.selenium.WebDriverException: {"id":16,"error":{"code":-32000,"message":"Fetch domain is not enabled"},"sessionId":"38CE9D37707C4427FA42B5B89B0CC98F"}
Build info: version: '4.28.0', revision: 'ac342546e9'
System info: os.name: 'Linux', os.arch: 'amd64', os.version: '6.6.52', java.version: '17.0.13'
Driver info: driver.version: unknown
        at org.openqa.selenium.devtools.Connection.handle(Connection.java:275)
        ... 4 more

Operating System

NixOS 24.11

Selenium version

Java 4.28.0

What are the browser(s) and version(s) where you see this issue?

Chromium 132.0.6834.110

What are the browser driver(s) and version(s) where you see this issue?

ChromeDriver 132.0.6834.110

Are you using Selenium Grid?

No response

[github-actions]

@MichailiK, thank you for creating this issue. We will troubleshoot it as soon as we can.

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Thank you!

[github-actions]

Hi, @MichailiK.
Please follow the issue template, we need more information to reproduce the issue.

Either a complete code snippet and URL/HTML (if more than one file is needed, provide a GitHub repo and instructions to run the code), the specific versions used, or a more detailed description to help us understand the issue.

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Reply to this issue when all information is provided, thank you.

[MichailiK]

I've just made this repo: https://github.com/MichailiK/NetworkInterceptorBug

(Make sure Chrome/Chromium 132+ is installed, cd into the repo, build the project using mvn package, then run using java -jar target/NetworkInterceptorBug-1.0-SNAPSHOT-All.jar)

The repro is inconsistent & may require several runs. I believe this is a race condition:

If I had a semi-educated guess on what is going on: Once I find the request I want to intercept, I read its request body & then I try to close/cleanup Selenium immediately. As I close() the network interceptor, Selenium may disable the Fetch domain before its entirely done processing (?) the last intercepted request.

A workaround to avoid this warning could be to wait/sleep a little bit before cleaning up & thus closing the network interceptor.

[github-actions]

This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[github-actions]

This issue was closed because it has been stalled for 14 days with no activity.

[github-actions]

This issue has been automatically locked since there has not been any recent activity since it was closed. Please open a new issue for related bugs.