Apropos of nothing a Raspberry Pi2B running RasPiOS reported
"Incompatible magic value 1157544534 in class file sun/security/x509/RDN"

The Owon VDS1022 software hasn't been changed, nor has the system software
been updated recently.

There have been problems getting the program to start and keep running,
fixed by rebooting the Pi.

If anybody recognizes what's wrong please post!

Thanks for reading,

bob prohaska




--- PyGate Linux v1.5.14
* Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)

bp@www.zefox.net writes:

Apropos of nothing a Raspberry Pi2B running RasPiOS reported
"Incompatible magic value 1157544534 in class file sun/security/x509/RDN"

Reported where?

The Owon VDS1022 software hasn't been changed, nor has the system
software been updated recently.

There have been problems getting the program to start and keep
running, fixed by rebooting the Pi.

If anybody recognizes what's wrong please post!

Your Java Runtime Environment is corrupted.

--
https://www.greenend.org.uk/rjk/

--- PyGate Linux v1.5.14
* Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)

Richard Kettlewell <invalid@invalid.invalid> wrote:

bp@www.zefox.net writes:

Apropos of nothing a Raspberry Pi2B running RasPiOS reported
"Incompatible magic value 1157544534 in class file sun/security/x509/RDN"

Reported where?

In a pop-up dialog box on the video console. So far it's only happened
after a day or two of uptime.

The Owon VDS1022 software hasn't been changed, nor has the system
software been updated recently.

There have been problems getting the program to start and keep
running, fixed by rebooting the Pi.

If anybody recognizes what's wrong please post!

Your Java Runtime Environment is corrupted.

Any hints how to sort this out? It seems that the corruption
must be developing somewhere in the executing binaries in
memory; fresh off the microSD card things work fine....

There've been a few other mysterious developments, lxterminal
windows vanishing without comment when clicked in the text
area among them.

The boot microSD was set up some time (months) ago and kept
un-updated after I discovered that updates were not compatible
with the Owon software. I've got a Pi5 running bookworm that
_is_ updated and I check occasionaly to see if it works with
the 'scope. So far, it hasn't.

The Owon software is from
https://github.com/florentbr/OWON-VDS1022
This "issue" seems relevant to the problem of later RasPiOS
versions not working at all: https://github.com/florentbr/OWON-VDS1022/issues/109

As an aside, is there a command to ascertain the version of
kernel and userland software the machine is running? I expected
some sort of "about this computer" button in the main menu, but
don't see anything recognizable.

Thanks for writing!

bob prohaska


--- PyGate Linux v1.5.14
* Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)

On Sun, 10 May 2026 22:28:04 -0000 (UTC), bp wrote:

Apropos of nothing a Raspberry Pi2B running RasPiOS reported
"Incompatible magic value 1157544534 in class file
sun/security/x509/RDN"

Can?t find any matches on that value (in either decimal or hex), so I
think it?s just simple file corruption, rather than confusion with a
file in the wrong format. The ?magic? value that identifies a .jar
file is supposed to be 3405691582, or ?CAFEBABE? in hex (geek humour).

<https://stackoverflow.com/questions/6797296/classformaterror-incompatible-magic-value-when-trying-to-run-java-jar-file>

--- PyGate Linux v1.5.14
* Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)

bp@www.zefox.net writes:

Richard Kettlewell <invalid@invalid.invalid> wrote:

Your Java Runtime Environment is corrupted.

Any hints how to sort this out? It seems that the corruption
must be developing somewhere in the executing binaries in
memory; fresh off the microSD card things work fine....

There've been a few other mysterious developments, lxterminal
windows vanishing without comment when clicked in the text
area among them.

There might be more information in the kernel log, readable with:
sudo journalctl -ke

I suspect a hardware issue. The uSD card is a common source of trouble,
they have a bit of a habit of wearing out, though other components can
fail too.

The boot microSD was set up some time (months) ago and kept
un-updated after I discovered that updates were not compatible
with the Owon software. I've got a Pi5 running bookworm that
_is_ updated and I check occasionaly to see if it works with
the 'scope. So far, it hasn't.

The Owon software is from
https://github.com/florentbr/OWON-VDS1022
This "issue" seems relevant to the problem of later RasPiOS
versions not working at all: https://github.com/florentbr/OWON-VDS1022/issues/109

As an aside, is there a command to ascertain the version of
kernel and userland software the machine is running? I expected
some sort of "about this computer" button in the main menu, but
don't see anything recognizable.

For the kernel:
uname -a

For Debian (including the Pi OS) the current distribution version is
usually captured in /etc/debian_version, although this is very coarse
grained. You can get version information about the installed packages
with:
dpkg -l

--
https://www.greenend.org.uk/rjk/

--- PyGate Linux v1.5.14
* Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)