An incomplete protrace on Linux due to the length of the hostname

An incomplete PROTRACE file is generated on Linux platforms
proGetStack SIGUSR1 or kill -10 creates an empty protrace file
The protrace file is empty, it only contains the Progress header
No C stack trace is recorded in the protrace
protrace never contains an ABL stack.
Output of 'hostname' command is longer than or equal to 20 characters
uname -a returns a hostname length >= 20 characters
uname --snrvm is the concatenation of : kernel name, nodename, release, version, and machine longer than 80 characters

Run: strace -xvttfo _progres -zp and then kill -10 PID or proGetStack PID

Strace output:
 

This is a defect related to the length of the hostname (related to Linux only).
An internal buffer overflows and corrupts the file descriptor to the protrace file.

In the strace output :

• Using open() to open the protrace file, it opens, get fd 15, the “stack trace header” is written to it, which succeeds
• But the remainder of write() calls is using fd 3289392 which is the overflow caused by the hostname length, so the write fails with no further content written to the protrace

Because a file descriptor gets corrupted, there is a chance that this data is written to another file the client process has open, instead of the protrace file. This will cause actual file corruption as well. 

• This may also lead to further issues, including but not limited to client temp-files being corrupted, and triggering crashes later on in the client's lifecycle.
• This is especially a risk when using self-service clients/shared memory connection:
• The contents of the protrace file can end up in a database extent file, thus corrupting the database. See Article:  Database corruption errors 9214 9212 9216 605 on Linux when processes generate protrace files

Upgrade to OpenEdge 11.3.3, 11.4.0 or later where PSC00294570 is fixed.

1. When only the C stack is needed, attach a debugger to the process (gdb -p PID) instead of using proGetStack.

2. Ensure that the Linux OS hostname command (its output) is shorter than 20 characters (eg <= 19).

If FQDN is used as a part of hostname, split it into "hostname" and "dnsdomainname" in /etc/sysconfig/network:

Progress Articles: 

proGetStack causes memory leak in AppServer   
Database corruption errors 9214 9212 9216 605 on Linux when processes generate protrace files   
AdminServer fails to start with ArrayIndexOutOfBoundsException with lengthy hostnames