peer did not return a certificate No CAs known to server for verification?

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Hello All,

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We have opened a java web service & our clients are facing issues while
accessing it. They are consistently getting SSL / TLS connection failure
message. All these clients are using VeriSign class 1 certificates. In
apache error logs we see below message:

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[Fri Oct 12 17:42:04 2007] [error] mod_ssl: Certificate Verification:
Error (20): unable to get local issuer certificate=20
[Fri Oct 12 17:42:04 2007] [error] mod_ssl: Re-negotiation handshake
failed: Not accepted by client!?=20
[Fri Oct 12 17:42:04 2007] [error] mod_ssl: Certificate Verification:
Error (20): unable to get local issuer certificate=20
[Fri Oct 12 17:42:04 2007] [error] mod_ssl: SSL error on writing data
(OpenSSL library error follows)=20
[Fri Oct 12 17:42:04 2007] [error] OpenSSL: error:140890B2:SSL
routines:SSL3_GET_CLIENT_CERTIFICATE:no certificate returned

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This is happening only with class 1 certificates, class 3 certificates
are working fine. Earlier we were using IBM HTTP Server & our clients
were able to connect to our web service. But since we have moved to
Apache HTTP Server, they are facing this issue.

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Is there any known fix for this? kindly advice. You suggestions are real
value for us.

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Note: All these clients are either PHP / .NET clients. Java clients are
able to use class 1 certificates successfully.

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Thanks,

Abhijit Mohan Bhate

+91-98-50-886360

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