The following bug has been logged on the website:
Bug reference: 15574
Logged by: Karl Pinc
Email address: kop@meme.com
PostgreSQL version: 10.6
Operating system: RHEL 7.6
Description:
On Jan 2 2019 upgraded to postgis24_10.x86_64 version 2.4.6-2.rhel7
from the pgdg10 repo.
Now, pg_dump gives me the following failure message:
pg_dump: [archiver (db)] query failed: ERROR: could not load library
"/usr/pgsql-10/lib/postgis-2.4.so": /usr/pgsql-10/lib/postgis-2.4.so:
undefined symbol: GEOSFrechetDistanceDensify
The following geos pacakges from pgdg10 repo were installed:
geos
geos36
geos37
Removing the geos36 package from the system resolved the problem.
I don't believe that we've ever manually installed geos packages,
although I could be wrong. I this this situation arose in the normal
course of doing "yum upgrade".