This was happening on a five node RAC. The root cause was an LDAP
failure. The load on the master node was to high to issue any srvctl
commands to either bounce instances nor database. Once the node was
re-booted every thing brought back the error went away.

Thanks to those who responded, your pointers where key!

Luis

-----Original Message-----
From: Luis Cardenas
[mailto:oracledba-ezmlmshield-x69327866.[Email address protected]
Sent: 03 September 2007 21:35
To: LazyDBA Discussion
Subject: URGENT: ORA-12528: TNS:listener: all appropriate instances are
blocking new connections

Can someone please urgently tell me how to sort this?



Luis







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