The RMAN backup alert Log reports a strange error.

Deploy the Rman backup plan and find the error message in alert. log after execution:
Fri Jul 6 00:30:16 2012
Errors in file/Oracle/admin/live/udump/***** _ ora_3652.trc:
Fri Jul 6 00:30:16 2012
Errors in file/oracle/admin/live/udump/***** _ ora_3652.trc:
Fri Jul 6 00:30:16 2012
Errors in file/oracle/admin/live/udump/***** _ ora_3652.trc
 
Then check the backup log. No error is found. Check the trace file.
[Oracle] $ cat/oracle/admin/*****/udump/****** _ ora_3652.trc
/Oracle/admin/*****/udump/***** _ ora_3652.trc
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0-Production
With the Partitioning and Data Mining options
ORACLE_HOME =/oracle/product/10.2.0
System name: Linux
Node name: servera
Release: 2.6.9-78. ELsmp
Version: #1 SMP Wed Jul 9 15:39:47 EDT 2008
Machine: i686
Instance name :*****
Redo thread mounted by this instance: 1
Oracle process number: 20
Unix process pid: 3652, image: oracle @ servera (TNS V1-V3)
* ** 00:30:16. 959
* ** Action name: (0000051 STARTED16) 00:30:16. 958
* ** Module name :( backup full datafile) 00:30:16. 958
* ** Service name :( SYS $ USERS) 00:30:16. 958
* ** Session id: (1620.20640) 00:30:16. 957

Metalink is interpreted as a bug 4596065, which occurs only in Oracle 10.2.0.1.0 on the Linux X86 platform and is only resolved within 11 GB. This is not a real error. You don't need to worry about it. Just ignore it
 
The bug 4596065 information is as follows:
Bytes ------------------------------------------------------------------------------------------
Bug No. 4596065
Filed 07-SEP-2005 Updated 18-OCT-2005
Product Oracle Server-Enterprise Edition Product Version 10.2.0.1.0
Platform. Linux x86 Platform. Version No Data
Database Version 10.2.0.1.0 Affects Platforms Generic
Severity Severe Loss of Service Status Development to Q/
Base Bug N/A Fixed in Product Version 11.0

Problem statement:

Rman backup generates empty trace files when DB_RECOVERY_FILE_DEST IS SET

 
This is also the case that many people have found online searches.
See the link
The following explanations are acceptable:
There seems to be apparently no problem with the trace file that is getting generated.
However is it the full trace file or have you just pasted the heading of the trace file.
You are correct in interpreting that this is related to the backup.
If this is not the full tracefile you can update the thread with some more information or atleast the call stack part of the trace file.
If this is the full file, then there is nothing much that can be inferred from it, and can be ignored.
 
The root of the error message does not need to be investigated and concerned. Just ignore it