Friday, July 21, 2017

Getting "NZ Library Error: Unknown error" when starting up OHS


You may have received the following obscure error when trying to start up OHS. This error would repeat indefinitely in the ohs1.log file:
[2017-04-16T14:19:35.0074+00:00] [OHS] [ERROR:32] [] [core.c] [host_id:] [host_addr:] [pid: 10627] [tid: 139289152765702] [user: oracle] [VirtualHost: SOAHOST1:8898]  NZ Library Error: Unknown error 

1. Edit httpd.conf.

2. Add the following line at the bottom of the file. It must be the loopback address, and any available port:

3. Restart OHS.

Applicable Versions
  • Oracle WebTier 11g (


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