Issue: Alert log says ORA-12543 and ORA-1034



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Primary Alert Logs
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PING[ARC1]: Heartbeat failed to connect to standby 'STANDBY'. Error is 12543.
Error 1034 received logging on to the standby
FAL[server, ARCa]: Error 1034 creating remote archivelog file 'STANDBY'
FAL[server, ARCa]: FAL archive failed, see trace file.
ARCH: FAL archive failed. Archiver continuing

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Standby Alert Log
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Archiver process freed from errors. No longer stopped
Fri Aug 28 09:01:17 2015
ARCH: Archival stopped, error occurred. Will continue retrying

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Solution
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      1. Check the standby side archive destination, clean up archives if any
      2. On Primary switch logfile and see arch is proceeding
      3. If not defer the destination and enable back