应用人员反馈报错，ORA-03137: TTC protocol internal error : [12333]

一、报错现象

应用人员反馈连接不上数据库，连接报错。

我们使用PLSQL发现可以连接数据库，但是数据库DB Alert存在如下报错信息

DB Alert
Fri Oct  ::
Errors in file d:\app\admin\diag\rdbms\orcl\orcl\trace\orcl_ora_1884.trc  (incident=):
ORA-: TTC protocol internal error : [] [] [] [] [] [] [] []
Fri Oct  ::
Sweep [inc][]: completed

DB Trace 

Dump file d:\app\admin\diag\rdbms\orcl\orcl\incident\incdir_597001\orcl_ora_3516_i597001.trc

Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production

ORA-03137: TTC protocol internal error : [12333] [64] [0] [54] [] [] [] []
========= Dump for incident 597001 (ORA 3137 [12333]) ========
*** 2019-10-18 11:29:24.282
dbkedDefDump(): Starting incident default dumps (flags=0x2, level=3, mask=0x0)
----- Current SQL Statement for this session (sql_id=133j06f4rsmfb) -----
select N0."OID",N0."BID",N0."CODE",N0."NAME",N0."ENA",N0."CMM",N0."CRE",N0."MDF",N0."RES",N0."RQT",N0."QMN",N0."QMX",N0."TYP",N0."STA",N0."STO",N0."RST",N0."RET",N0."RFX",N0."TFX",N0."WOP",N0."TUS",N0."STR",N0."PRE",N0."NXT",N0."LEN",N0."MUI" from "WUS" N0
where (N0."RES" = :p0)

二、问题处理

MOS 匹配
Document 9703463.8
Document 1388487.1
This bug is fixed in:
12.1 (Future Release)
11.2.0.2 (Server Patch Set)
11.2.0.1 Bundle Patch  for Exadata Database
11.1.0.7. Patch Set Update
11.2.0.1 Patch  on Windows Platforms
11.1.0.7 Patch  on Windows Platforms
Solutions:
. The quickest solution is to apply the workaround of setting _optim_p
to false to disable bind peeking. However, this may impact performance
SQL> alter system set "_optim_peek_user_binds"=false;
. If you would prefer a fix to the issue and are on database version 11.2
latest patch set. If you are on database version 11.1, apply the latest PS
patch set contains the fix to all  bugs. Oracle recommends applying pa
available instead of individual patches.
. If you would prefer an individual patch, then refer to Patch 9703463f
patches. You may also need to apply Patch 12534597to correct an issu
the fix to bug . If the issue is not resolved by these patches, the
need to apply the patch for the other  bugs.
To determine if a patch is available click on the patch link provided abo
following:
. Choose 11.2.0.1. as the "Release"
. Choose Windows NT Version V6. Service Pack  as the "Platfo
NOTE: The database version and platform will not appear in the drop d
when a patch is unavailable for that database version and platform.

根据Alert，问题说明并非应用反馈的连接报错，而是应用已经连接数据库后，执行SQL，遇到了oracle bug导致，应用反馈数据库操作异常。

select instance_number,sql_id,name, datatype_string,last_captured,value_string from dba_hist_sqlbind where sql_id='&sql_id' and rownum<10 order by LAST_CAPTURED,POSITION;

根据另一个trace中的userid得到用户名称，上述绑定变量查询到具体值，测试执行返回Null值

根据上述种种信息，尝试执行参数修改：

SQL> alter system set "_optim_peek_user_binds"=false;
 问题解决（在修改参数前，已重启应用无效果）