If analyze and exporting the table (in the presence of chained rows) both report no errors then this should be considered a consistent read issue.
Once you understand the nature of the problem you can review the list of known bugs and determine which one matches your condition. If you cannot determine which issue is affecting you then open a service request with Oracle Support and upload the RDBMS and ASM (if applicable)instance alert logs for all nodes, any trace and incident files generated and a full description of the nature of the problem.
我们的数据库并没有块损坏，刷新一下buffer cache就不报错了。
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