Common Server issues – FAQs and answers from those in the know
Why do i keep getting the 500 internal server error when i start up XAMPP?
4 February 2026 @ 8:30 pm
I keep getting this error message when I start up Xampp and try to log into my localhost wordpress site.
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator at postmaster@localhost to inform them of the time this error occurred, and the actions you performed just before this error.
More information about this error may be available in the server error log.
Apache/2.4.58 (Win64) OpenSSL/3.1.3 PHP/8.2.12 Server at localhost Port 80"
I checked the Apache error logs to see what the issue was and I got:
Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.
So i tried replacing my htacesss file from this
BEGIN WordPress
The directives (lines) between &q
Users losing session data on dynamic quiz site hosted on nginx [closed]
4 February 2026 @ 8:18 pm
I host a quiz-style site similar to http://xxx.pk.
Sometimes users lose their session data or progress when navigating between pages or after a short period of inactivity.
The site uses dynamic javascript to handle quizzes, scores, and answers.
It seems like either caching, session handling, or reverse proxy settings are interfering.
Some users report that refreshing the page or switching tabs causes their progress to reset.
Has anyone dealt with similar issues for web apps that behave more like interactive learning games?
What’s the recommended way to configure sessions, caching headers, or server settings to ensure quiz state isn’t lost for users?
Any tips or best practices would be really helpful!
How to obtain a core dump from JNI library
4 February 2026 @ 3:35 pm
I wrote a C library used into a Java program via JNI Swig. It's called by a Tomcat service. Sometimes the server crashes and the problem seems to be in the lib. The catalina.out log file has a single unhelpful line malloc(): unaligned tcache chunk detected, and a probably related file /tmp/hs_err_pid49296.log appears such as:
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f07700b818a, pid=49296, tid=49388
#
# JRE version: OpenJDK Runtime Environment Corretto-17.0.6.10.1 (17.0.6+10) (build 17.0.6+10-LTS)
# Java VM: OpenJDK 64-Bit Server VM Corretto-17.0.6.10.1 (17.0.6+10-LTS, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, parallel gc, linux-amd64)
# Problematic frame:
# C [libc.so.6+0xb818a] free+0x1c
#
# Core dump will be written. Default location: Core dumps may be processed with "/bin/false" (or dumping to //core.49296)
#
# If you would like
Replace HPKPof new certificate with a HPKP of an old certificate
4 February 2026 @ 2:55 pm
I need urgent Help please ASAP to give an accurate info,
I have a code-signed desktop application distributed to thousands of clients with embedded HPKP (HTTP Public Key Pinning) for latercheck upon a new release. Our old DigiCert code-signing certificate expired already, and we purchased a new certificate. However, the new certificate has a different public key, causing HPKP validation to fail and breaking our auto-update mechanism. The old certificate's private key is on a SafeNet eToken 5100 (Gemalto ID Prime MD) that is now PIN-locked (user PIN locked, user PIN count low). A former colleague who initialized the token has left, and we've lost the user PIN.
What I need to know:
Can I replace the HPKP of the new certificate with the HPKP of the old certificate.
Does unlocking with SO-PIN preserve the original private key? Will the old private key remain intact and usable after unlocking with the SO-PIN, or does unlocking generate
Seeking feedback: Replacing 10 Windows VMs with Linux network namespaces for parallel modem testing (same IP across VLANs)
4 February 2026 @ 11:34 am
I’m looking for expert feedback on a lab setup I’m building for high-throughput “modem refurbishment” testing, and whether a Linux network-namespace approach is the right long-term solution.
What I’m trying to do (goal)
In our refurbishment workflow, operators connect 10 modems at a time to a switch, run an automated test batch, then swap them out with another set of 10 modems and repeat throughout the day.
Each modem typically uses the same default LAN IP (e.g. 192.168.1.1), we do NOT change IP's. We want to run tests in parallel across 10 modems without IP conflicts, ideally completing a batch in about a minute.
Current network topology
Cisco Catalyst 3750 switch
Modem ports are access ports, one modem per VLAN: VLAN 101–110
Test host uplink is a 802.1Q trunk allowing VLANs 101–110
So the L2 separation is already there, but because the modems share the same IP,
IPv6 Auto Configuration Assigning Ipv6 Address
4 February 2026 @ 6:53 am
I am trying to debug an issue where in one setup the auto assigning of Ipv6 address is working but for an other setup it does not. Hence my post to understand how to find what the issue is.
We have an IPv6 firmware device whose MAC address is 00:XX:XX:00:8C:94. When we power-on the drive and have a Raspberry PI setup acting like DHCv6 server connected to firmware over network.
My findings for working scenario:
I see in Wireshark logs and Firmware logs that Firmware has subscribed for below IPv6 Multicast address:
FF02::1:FF00:8C94
The RI then sends the data for same multicast address
FF02::1:FF00:8C94
With router advertisement ICMPv6 Option (Prefix information : 2001:1200:1100:1000::/64)
So firmware gets itself IPv6 address assigned to 2001:1200:1100:1000:xxxx:xxxx:xxxx:xxxx
Non-working scenario:
Firmware M
Hmac key error on Invidious
4 February 2026 @ 3:08 am
Following the Invidious installation, I created the following Docker Compose File
services:
invidious:
image: quay.io/invidious/invidious:latest
# image: quay.io/invidious/invidious:latest-arm64 # ARM64/AArch64 devices
restart: unless-stopped
# Remove "127.0.0.1:" if used from an external IP
ports:
- "3000:3000"
environment:
# Please read the following file for a comprehensive list of all available
# configuration options and their associated syntax:
# https://github.com/iv-org/invidious/blob/master/config/config.example.yml
INVIDIOUS_ : |
db:
dbname: invidious
user: kemal
password: kemal
host: invidious-db
port: 5432
check_tables: true
invidious_companion:
# URL used for the internal communication between invidious and invidious companion
# There is no need to change that except if Invidious companion
GPO for Folder Redirection fails intermittently for subset of users
3 February 2026 @ 11:59 pm
We have a Folder Redirection Group Policy that redirects the Desktop and Documents folders to network share \\fileserver\users$.
10% of users on Windows 11 23H2, the folders fail to redirect on logon with error ID 112 in the event log, leaving local folders.
This is intermittent. Logging off and on sometimes fixes it.
Could this be a timing issue with drive mapping or network resource availability during logon?
Should we implement a logon script delay or use "Wait for network" policy, and if so, what's the current best practice?
Copy Scheduled Tasks to another server
3 February 2026 @ 10:38 pm
The following script: (copied from copilot response):
Get-ScheduledTask | ForEach-Object {
$taskName = $_.TaskName
$taskPath = $_.TaskPath
$exportPath = "C:\Tasks\$($taskName).xml"
Export-ScheduledTask -TaskName $taskName -TaskPath $taskPath -OutputFile $exportPath
}
Returns this error:
ForEach-Object : A parameter cannot be found that matches parameter name 'OutputFile'.
At C:\Users\myUserName.ENT\exportScheduledTasks.ps1:2 char:21
+ Get-ScheduledTask | ForEach-Object {
+ ~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (:) [ForEach-Object], ParameterBindingException
+ FullyQualifiedErrorId : NamedParameterNotFound,Microsoft.PowerShell.Commands.ForEachObjectCommand
Windows Server 2019 SMB client loses access to Hitachi HNAS share (BizTalk workload)
3 February 2026 @ 9:23 pm
I have Windows Server 2019 with biztalk for client side that write and read files on a nas folder from Hitachi version 14.9.
The server biztalk wrote on example a folder shared name mapped on domain.int.local.xxx\sharefolder\test\test2
My problem is that after each day(less than 16 hours) , my shared folder become not available. I have to restart the service workstation to release the smb session/connections.
I am troubleshooting an SMB stability issue between Windows Server 2019 (BizTalk) and a Hitachi HNAS 14.x.
Details :
Windows Server 2019 (SMB client)
BizTalk Server (high file read/write workload)
Hitachi NAS (HNAS) 14.x
SMB protocol: mostly SMB 3.1.1, some 3.0.2
Authentication: Kerberos
NIC: VM (vmxnet3)
NAS accessed via a single SMB alias/share
Problem
Under load, the SMB share hosted on the Hitachi NAS becomes