logger unnecessarily splits messages sent via stdin into 1024 byte chunks

Issue

• It seems that in every version of RHEL, the logger command splits messages sent via stdin into 1024-byte (or 1 KiB) chunks. In contrast, when input message is passed as a cmdline argument (e.g., logger $(perl -E 'say "a" x 2000)) logger does not split or truncate the message.

• I have configured Apache httpd to send logs to syslog with directives like the following:

  CustomLog "|/bin/logger -t httpd -p local0.info" common
  ErrorLog "|/bin/logger -t httpd -p local0.err"
  

  However, on the syslog side, messages greater than 1000 characters get split into multiple log entries.

• I followed the directions in How can an application in RHEL7 write logs directly to local/remote rsyslog, bypassing journald? but logger appears to be splitting long messages on a 1k limit.