in a physical standby that was out of synchronization….i found that the below errors were thrown:

ORA-00317: file type 0 in header is not log file

ORA-00334: archived log: ‘/stdby/arc/arch_t211_1_972641998_48514.arc’

To resolve this issue:

the error is indicating that the archive log was is corrupted. so i restored the archive log using RMAN:

rman target /

RMAN> restore archivelog logseq=48514;

the archive log restored successfully and then applied on the standby.

hope this helps