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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsThis message means find tried to read per-thread process metadata under Linux’s /proc filesystem and was denied. If you are searching for application or project files, narrow the search to the relevant directory or exclude /proc. If the scan needs process data, check the container user, procfs mount options, and Docker security configuration before changing access controls. The error alone does not identify its exact cause.
What the error means
/proc is a Linux pseudo-filesystem that exposes process and system information. In this path, task/149 refers to a thread (task) associated with process 27, and fdinfo contains information about that task’s open file descriptors. Linux documents procfs access restrictions, including the hidepid mount option, and Docker’s security configuration affects what processes in a container can access. See the proc(5) manual, the Linux proc filesystem documentation, and Docker Engine security.
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The numbers 27 and 149 are transient process and thread identifiers. They do not, by themselves, indicate a damaged file, broken Docker installation, or failed application. The path and permission failure suggest what find attempted to inspect, but the error line alone cannot establish why access was denied in your container.
Fix it when you are searching for application files
Start by checking the command’s search root. A search from / or another broad tree can reach procfs even when the task is only to find project files. Restrict the search to the application directory that matters; this avoids traversing unrelated live process metadata.
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If a broad traversal is necessary for another reason, exclude /proc when process information is not part of the results. The exact exclusion syntax depends on the command you are running and where /proc appears in its search tree, so verify the expression against your installed find manual.
If the scan needs process metadata
Do not treat the warning as a reason to grant broader access immediately. First establish that the task needs to inspect this process data, then check the relevant settings:
- Identify the process user. Check which user runs the command inside the container and whether that identity is expected to read the target process metadata.
- Inspect procfs and its mount options. Determine how
/procis mounted in the container and whether access restrictions such ashidepidapply. The proc(5) manual documents procfs mount options. - Review Docker’s security configuration. Check the container’s configured security profile and related access boundaries. Docker describes its security features in the Engine security documentation; its AppArmor documentation explains the AppArmor profile used with containers.
- Compare access where practical. Compare the command’s behavior inside and outside the container, while accounting for differences in user identity and process namespaces. A difference can help narrow the cause, but does not by itself identify which setting is responsible.
Do not loosen host-wide procfs restrictions or container security controls solely to silence the warning. Make an access change only when process inspection is required and you have identified the restriction that blocks it.
Should you suppress the error?
Only consider error suppression if the scan can still meet its purpose when some entries are inaccessible. Consult the manual for the find implementation installed in the image to confirm its supported error-handling options and their behavior. Suppression can make output quieter, but it can also hide an incomplete scan; it does not grant access to fdinfo or resolve the underlying restriction.
Choosing the least disruptive remedy
| Approach | Best fit | Trade-off |
|---|---|---|
Narrow the search root or exclude /proc |
The task concerns application or project files, not process inspection. | Avoids unrelated procfs traversal without changing access controls. |
| Allow the scan to continue past inaccessible entries | Some entries may be skipped without invalidating the result. | Suppressing errors can conceal incomplete results; verify the option in the installed manual. |
| Change procfs or security access | Reading process metadata is a genuine requirement and a specific restriction has been identified. | Can expose additional process or host information; requires careful diagnosis and justification. |
Why the exact cause may differ
The cause depends on details not contained in the error line, including the image, command, container user, host configuration, namespace mode, procfs mount options, and active security profile. Procfs access controls and Docker security boundaries explain plausible reasons for the denial, but the path alone cannot distinguish among them.
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