FULL PRODUCT VERSION :
java version " 1.7.0_21 "
Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)

and

java version " 1.7.0_17 "
Java(TM) SE Runtime Environment (build 1.7.0_17-b02)
Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux dev29 3.2.0-40-generic #64-Ubuntu SMP Mon Mar 25 21:22:10 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
sign commons-httpclient-3.1.jar

the part of the MANIFEST.MF which rise the Exception:

Name: org/apache/commons/httpclient/auth/RFC2617Scheme.class
SHA-256-Digest: wl5b1M1hkLUHfsu2/PfBEMDm430PAwIGcj5FTWHOuhM=

Name: org/apache/commons/httpclient
Implementation-Vendor: Apache Software Foundation
Implementation-Title: org.apache.commons.httpclient
Implementation-Version: 3.1
Implementation-Vendor-Id: org.apache
Specification-Vendor: Apache Software Foundation
Specification-Title: Jakarta Commons HttpClient
Specification-Version: 3.1
Extension-name: org.apache.commons.httpclient
X-Compile-Source-JDK: 1.2
X-Compile-Target-JDK: 1.2

Name: org/apache/commons/httpclient/methods/StringRequestEntity.class
SHA-256-Digest: n/1uuLVWR7Vgei/qE/Z+Rpfen0+kVuLkId11OQAe8Vg=

Without the line Name: org/apache/commons/httpclient
no Exception occures.

or signe ojdbc5-11.2.0.3.jar

the part of the MANIFEST.MF which rise the Exception:

Name: oracle/jdbc/internal/KeywordValueLong.class
SHA-256-Digest: Qymi7Xc9Qb1onkmnue6b2Ju8GbFBkKHo1M+TI5lhDJQ=

Name: oracle/sql/converter/
Sealed: false
SHA-256-Digest: 47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=

Name: oracle/jdbc/driver/T2CConnection.class
SHA-256-Digest: sc3C+olARuzpmRhaC1+YApzflh8DPxvdsfMCLkunxi8=

Without the lines

Name: oracle/sql/converter/
Sealed: false
SHA-256-Digest: 47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=

no Exception occures.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
signe commons-httpclient-3.1.jar or ojdbc5-11.2.0.3.jar

write main dummy main for webstart run

fill up teh following jnlp

<?xml version= " 1.0 " encoding= " UTF-8 " ?><!DOCTYPE jnlp PUBLIC " -//Sun Microsystems, Inc//DTD JNLP Discriptor 1.5//EN " " http://java.sun.com/dtd/JNLP-1.5.dtd " >
<jnlp spec= " 1.0+ " codebase= " ???? " href= " ???? " >
  <information>
    <title>???</title>
    <homepage href= " http://??? " />
    <description>
</description>
  </information>
  <security>
    <all-permissions/>
  </security>
  <resources>
    <j2se version= " 1.7+ " max-heap-size= " 1024m " />
    <jar href= " ?.jar " />
    <jar href= " lib/commons-httpclient-3.1.jar " />
    <jar href= " lib/ojdbc5-11.2.0.3.jar " />
  </resources>
  <application-desc main-class= " ??? " />
</jnlp>

and launch the programm with javaws

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
the jar's shoud by accepted as signed

REPRODUCIBILITY :
This bug can be reproduced always.j

CUSTOMER SUBMITTED WORKAROUND :
remove the Name: properties from the MANIFEST.MF then signe them.