A simple client-server app results in the following exception on the client side
 sun.security.pkcs11.wrapper.PKCS11Exception: CKR_OPERATION_NOT_INITIALIZED
A stack trace is given below.
Note that the client runs N threads. If N is 1 - there are no exceptions.
This looks similar to CR 2191319 (wich is a subCR for 6924489 for 6 -pool) but the root cause might be different.
This is probably solaris and sparc specific.

java.security.ProviderException: update() failed
        at sun.security.pkcs11.P11Cipher.implUpdate(P11Cipher.java:547)
        at sun.security.pkcs11.P11Cipher.engineUpdate(P11Cipher.java:447)
        at javax.crypto.Cipher.update(DashoA13*..)
        at com.sun.net.ssl.internal.ssl.CipherBox.encrypt(CipherBox.java:141)
        at com.sun.net.ssl.internal.ssl.OutputRecord.encrypt(OutputRecord.java:199)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.writeRecordInternal(SSLSocketImpl.java:742)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:731)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.sendAlert(SSLSocketImpl.java:1758)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1644)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1612)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1595)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1521)
        at com.sun.net.ssl.internal.ssl.AppOutputStream.write(AppOutputStream.java:64)
        at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
        at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
        at com.sun.jndi.ldap.Connection.writeRequest(Connection.java:396)
        at com.sun.jndi.ldap.LdapClient.ldapBind(LdapClient.java:334)
        at com.sun.jndi.ldap.LdapClient.authenticate(LdapClient.java:192)
        at com.sun.jndi.ldap.LdapCtx.connect(LdapCtx.java:2694)
        at com.sun.jndi.ldap.LdapCtx.<init>(LdapCtx.java:293)
        at com.sun.jndi.ldap.LdapCtxFactory.getUsingURL(LdapCtxFactory.java:175)
        at com.sun.jndi.ldap.LdapCtxFactory.getUsingURLs(LdapCtxFactory.java:193)
        at com.sun.jndi.ldap.LdapCtxFactory.getLdapCtxInstance(LdapCtxFactory.java:136)
        at com.sun.jndi.ldap.LdapCtxFactory.getInitialContext(LdapCtxFactory.java:66)
        at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:667)
        at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:288)
        at javax.naming.InitialContext.init(InitialContext.java:223)
        at javax.naming.ldap.InitialLdapContext.<init>(InitialLdapContext.java:134)
        at MyDirCommunicator.run(MyDirCommunicator.java:125)
Caused by: sun.security.pkcs11.wrapper.PKCS11Exception: CKR_OPERATION_NOT_INITIALIZED
        at sun.security.pkcs11.wrapper.PKCS11.C_EncryptUpdate(Native Method)
        at sun.security.pkcs11.P11Cipher.implUpdate(P11Cipher.java:500)