On Fri, Mar 15, 2019 at 12:10:59AM +0800, Mike Yeap wrote: > Hi Noah, below is the output from one of the servers having this issue: > > $ echo "select pg_backend_pid(); load 'dblink'; select pg_sleep(100)" | psql -X & > [1] 9731 > > $ select pg_backend_pid(); load 'dblink'; select pg_sleep(100) > pg_backend_pid > ---------------- > 9732 > (1 row) > > LOAD > > $ gdb --batch --pid 9732 -ex 'info sharedlibrary ldap' > > warning: .dynamic section for "/lib64/libldap-2.4.so.2" is not at the expected address (wrong library or version mismatch?) > > warning: .dynamic section for "/lib64/liblber-2.4.so.2" is not at the expected address (wrong library or version mismatch?) > [Thread debugging using libthread_db enabled] > Using host libthread_db library "/lib64/libthread_db.so.1". > 0x00007f1e7592dcf3 in __epoll_wait_nocancel () from /lib64/libc.so.6 > From To Syms Read Shared Object Library > 0x00007f1e7637d0f8 0x00007f1e763ae51c Yes (*) /lib64/libldap-2.4.so.2 > 0x00007f1d9f2c16d0 0x00007f1d9f2f5ae4 Yes (*) /lib64/libldap_r-2.4.so.2 > (*): Shared library is missing debugging information. Thanks. That rules out my guess. I don't have another guess at this time.