imp错误IMP-00098: INTERNAL ERROR: impgst2Segmentation fault

如果使用impdp要看dump的内容，可以使用sqlfile参数，他会将所有的DDL语句写入文件，

SQLFILE Write all the SQL DDL to a specified file.

如果使用imp要看dump的内容，可以使用show参数，默认值为n，

SHOW     just list file contents (N)

但是今儿执行了指令imp，提示错误，

imp oracle/oracle@x.x.x.x:1521/lk fromuser=user_a touser=user_b file=/home/oracle/data.dmp log=/home/oracle/data.log show=y ... illegal lob length marker 65279 bytesread = 00000000000 TABLE = IMP-00098: INTERNAL ERROR: impgst2Segmentation fault

oerr显示00098是一个内部的错误，

oerr imp 00098 00098, 00000, "INTERNAL ERROR: %s" // *Cause:  An INTERNAL error occurred. // *Action: Contact Oracle Worldwide Support.

针对这种错误，MOS这篇文章《Import Fails With IMP-98 Internal Error impgst2 Segmentation Fault Core Dumped (Doc ID 578616.1)》给出了介绍，

When executing the import command by adding the parameter SHOW=Y to scan the dump file, then the same error is reported.

出现这种错误的原因，就是dump文件出现了问题，要么因为导出工具所致，要么是因为mv/cp文件导致的，

The fact that running import with SHOW=Y generates same error indicates that the export dump file is corrupted. When SHOW=Y is used, the content of the export dump file is listed to the display and not imported. There are two ways an export dump file could be corrupted:

• the export tool corrupts the file itself; 
• the file is corrupted during the transfer (move/copy) from the source to the target machine; this is the most common cause of the error.

相应的解决方案，就是重新导入，如果源端测试imp ... show=y报这个错误，则说明原始dump文件有问题，如果没错，移动文件在目标端执行imp ... show=y，要是提示错误，则说明传输过程中出现错误，

Since the export dump file is corrupt, the export needs to be done again:

• After the export is finished, one should always check if the export dump file is corrupted on the source machine using imp with SHOW=Y. When getting the above errors, the file was corrupted on the source machine
• Assuming the file is not corrupted on the source machine, after transferring the file, one must execute imp with SHOW=Y on target machine. If getting the above errors then the file was corrupted during transfer.

Use ftp command in binary mode as a way of transferring the dump file between source and target machines.

• If imp with SHOW=Y reports no errors after the above steps then proceed with the real import.

需要注意的是，使用show=y并不会执行实际导入，因此若用show=y正常，再进行真实的导入操作，就比较稳妥了。

对于上面的案例，可惜的是原始文件就有问题，由于原始库已经无法访问，因此成了悬案。

针对导入导出，之前碰见了各种错误，朋友们若有兴趣，可以参考，若是碰见了其他的问题，欢迎文末回复，以提醒朋友们，再次碰见的时候，可以快速定位和解决，与人方便就是与己方便，《Oracle导入导出的常见错误》《解决导入过程中出现的ORA-02289错误》、《生产数据导入测试环境碰见的一些问题》、《使用exp导出报错EXP-00091》、《数据迁移中碰见的一些问题》、《如何验证dump文件的有效性》。