Currently pre JDK 6 classes are not supported by CDS due to class verification issues. There are still large number of existing classes with older class version (< 50) in real world applications. Those classes are missing the benefit of CDS. 
In some use cases, class verification is disabled. For those use cases, we can consider supporting pre JDK 6 classes with CDS.
In some use cases, class verification is disabled. For those use cases, we can consider supporting pre JDK 6 classes with CDS.
- csr for
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                    JDK-8234023 Only verify non-system class when verification is enabled during CDS dump time -           
- Closed
 
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- relates to
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                    JDK-8197972 Always verify non-system classes during CDS dump time -           
- Resolved
 
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                    JDK-8261090 Store old classfiles in static CDS archive -           
- Resolved
 
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                    JDK-8198849 Always verify non-system classes during CDS dump time -           
- Closed
 
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