【故障处理】imp-00051,imp-00008

1.1  BLOG文档结构图

1.2  故障分析及解决过程

imp导入报错：

IMP-00051: Direct path exported dump file contains illegal column length

IMP-00008: unrecognized statement in the export file

IMP-00009: abnormal end of export file

[oracle@lhrdb ~]$ oerr imp 51

00051, 00000, "Direct path exported dump file contains illegal column length"

// *Cause:  An invalid column length was encountered while processing column

//          pieces."

// *Action: Check to make sure the export file is not corrupted, or else

//          report this to Oracle Worldwide Support as an Import/Export

//          internal bug and submit the

//          export file.

由于使用了direct=y的方式导出，所以导入的时候报错。MOS上是针对分区表的某一个空的分区导入的时候会报该错，但是客户这边的表不是分区表，dmp文件太大，不能做具体原因分析。给出的解决方案为：针对报错的表单独导出，并采用parfile参数。

[ZFZHLHRDB1:oracle]:/oracle>more /tmp/scottfile.par

tables=scott.emp,scott.dept

exp \‘/ AS SYSDBA\‘   file=/tmp/test_query_lhr_scott_01.dmp  parfile=/tmp/scottfile.par log=/tmp/test_query_lhr_scott_01.log

参考的MOS文档：

Traditional Import (IMP) Raises Error IMP-51 Direct Path Exported Dump File Contains Illegal Column Length (文档 ID 1403865.1)

ALERT Direct Path Export (EXP) Corrupts The Dump If An Empty Table Partition Exists (文档 ID 1604983.1)

The traditional export utility is de-supported beginning with the version 11g and is no more maintained.

exp和imp从11g开始不再维护。

1.3  MOS

1.3.1  ALERT Direct Path Export (EXP) Corrupts The Dump If An Empty Table Partition Exists (文档 ID 1604983.1)

In this Document

APPLIES TO:

Oracle Database - Enterprise Edition - Version 11.2.0.1 and later
Information in this document applies to any platform.
***Checked for relevance on 31-Oct-2016***

DESCRIPTION

You performed a direct path export (table, schema or full) using the traditional export utility (EXP). If the exported objects include an empty table partition, then the export dump is corrupt and cannot be imported. 

OCCURRENCE

Only exp versions >= 11.2.0.1 are affected. The traditional export utility is de-supported beginning with the version 11g and is no more maintained.

SYMPTOMS

During import you may see one of the following issues:

IMP-00009: abnormal end of export file

Or:

IMP-00051: Direct path exported dump file contains illegal column length
IMP-00008: unrecognized statement in the export file

Or:

Import silently skips a part of the dump, tables are missing and later constraints cannot be created.

This is below demonstrated with a simple test:

connect test
create table part001
(
   col001  number,
   col002  varchar2(100)
)
partition by range (col001)
(
   partition p001 values less than (10),
   partition p002 values less than (100),
   partition p003 values less than (1000)
);

insert into part001 values (5, ‘Text 5‘);
insert into part001 values (500, ‘Text 500‘);
commit;

#> exp test/password file=part001.dmp tables=part001 direct=y

This will show:

About to export specified tables via Direct Path ...
. . exporting table                        PART001
. . exporting partition                           P001          1 rows exported
. . exporting partition                           P002          0 rows exported
. . exporting partition                           P003          1 rows exported
Export terminated successfully without warnings.

but the import breaks with error:

. importing TEST‘s objects into TEST
. . importing partition               "PART001":"P001"          1 rows imported
. . importing partition               "PART001":"P002"
IMP-00009: abnormal end of export file
Import terminated successfully with warnings.

WORKAROUND

If you perform direct path exports using a version greater or equal 11.2.0.1 and you see the messages:

About to export specified tables via Direct Path ...
...
. . exporting partition                     <partition_name>           0 rows exported
...

in the export output (or log file), then you obtain a corrupt dump. You can verify the dump with the commands:

#> imp user/passw full=y

or:

#> imp user/passw full=y show=y

which will show you one of the behaviors listed above.

To workaround this please use:

- conventional path export (exp direct=n)

Or:

- materialize the empty partitions before running direct path exports:

connect / as sysdba
exec dbms_space_admin.materialize_deferred_segments (schema_name => ‘TEST‘, table_name => ‘PART001‘, partition_name => ‘P002‘);

Or:

- DataPump export (expdp)

HISTORY

[03-DEC-2013] - Document created

REFERENCES

BUG:13880226 - IMPORT FAIL WITH IMP-00051 AND IMP-00008

1.3.2  Traditional Import (IMP) Raises Error IMP-51 Direct Path Exported Dump File Contains Illegal Column Length (文档 ID 1403865.1)

In this Document

APPLIES TO:

Oracle Server - Enterprise Edition - Version 11.2.0.2 and later
Information in this document applies to any platform.

SYMPTOMS

An original import of an export dump file created from an 11.2.0.2 database with DIRECT=Y fails with:

IMP-00051: Direct path exported dump file contains illegal column length

CAUSE

The exact cause is undetermined in this case.

SOLUTION

Instead of using the traditional export/import, use the DataPump export/import as a workaround.

About Me

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【故障处理】imp-00051,imp-00008