Affected Platforms: Win8.1/Win10-x64 with Cygwin
Locale: Hindi hi_IN
JDK version: 7u101b11
Testsuite: Regression-jdk
Reproducibility: always in Hindi locale, not reproducible in English locale.

Description:
3 kerberos 5 tests failed:
sun/security/krb5/auto/W83.java
sun/security/krb5/auto/ok-as-delegate-xrealm.sh
sun/security/krb5/auto/ok-as-delegate.sh

Error Log:
(1) sun/security/krb5/auto/W83.java
result: Error. Program `C:\Dora\7u101\b11\7u101build11_03012016\..\jdk1.7.0_101\bin\java' timed out (timeout set to 120000ms, elapsed time was 120031ms).

(2)sun/security/krb5/auto/ok-as-delegate-xrealm.sh
Exception in thread "main" javax.security.auth.login.LoginException: Receive timed out at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Krb5LoginModule.java:767)
at com.sun.security.auth.module.Krb5LoginModule.login(Krb5LoginModule.java:584)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at javax.security.auth.login.LoginContext.invoke(LoginContext.java:762)
at javax.security.auth.login.LoginContext.access$000(LoginContext.java:203)
at javax.security.auth.login.LoginContext$4.run(LoginContext.java:690)
at javax.security.auth.login.LoginContext$4.run(LoginContext.java:688)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.login.LoginContext.invokePriv(LoginContext.java:687)
at javax.security.auth.login.LoginContext.login(LoginContext.java:595)
at Context.fromJAAS(Context.java:105)
at OkAsDelegateXRealm.main(OkAsDelegateXRealm.java:117)
Caused by: java.net.SocketTimeoutException: Receive timed out
at java.net.DualStackPlainDatagramSocketImpl.socketReceiveOrPeekData(Native Method)
at java.net.DualStackPlainDatagramSocketImpl.receive0(DualStackPlainDatagramSocketImpl.java:125)
at java.net.AbstractPlainDatagramSocketImpl.receive(AbstractPlainDatagramSocketImpl.java:145)
at java.net.DatagramSocket.receive(DatagramSocket.java:817)
at sun.security.krb5.internal.UDPClient.receive(NetClient.java:207)
at sun.security.krb5.KdcComm$KdcCommunication.run(KdcComm.java:390)
at sun.security.krb5.KdcComm$KdcCommunication.run(KdcComm.java:343)
at java.security.AccessController.doPrivileged(Native Method)
at sun.security.krb5.KdcComm.send(KdcComm.java:327)
at sun.security.krb5.KdcComm.send(KdcComm.java:219)
at sun.security.krb5.KdcComm.send(KdcComm.java:191)
at sun.security.krb5.KrbAsReqBuilder.send(KrbAsReqBuilder.java:319)
at sun.security.krb5.KrbAsReqBuilder.action(KrbAsReqBuilder.java:364)
at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Krb5LoginModule.java:725)
... 14 more

(3)sun/security/krb5/auto/ok-as-delegate.sh
Exception in thread "main" javax.security.auth.login.LoginException: Receive timed out
at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Krb5LoginModule.java:767)
at com.sun.security.auth.module.Krb5LoginModule.login(Krb5LoginModule.java:584)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at javax.security.auth.login.LoginContext.invoke(LoginContext.java:762)
at javax.security.auth.login.LoginContext.access$000(LoginContext.java:203)
at javax.security.auth.login.LoginContext$4.run(LoginContext.java:690)
at javax.security.auth.login.LoginContext$4.run(LoginContext.java:688)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.login.LoginContext.invokePriv(LoginContext.java:687)
at javax.security.auth.login.LoginContext.login(LoginContext.java:595)
at Context.fromJAAS(Context.java:105)
at OkAsDelegate.go(OkAsDelegate.java:67)
at OkAsDelegate.main(OkAsDelegate.java:36)
Caused by: java.net.SocketTimeoutException: Receive timed out
at java.net.DualStackPlainDatagramSocketImpl.socketReceiveOrPeekData(Native Method)
at java.net.DualStackPlainDatagramSocketImpl.receive0(DualStackPlainDatagramSocketImpl.java:125)
at java.net.AbstractPlainDatagramSocketImpl.receive(AbstractPlainDatagramSocketImpl.java:145)
at java.net.DatagramSocket.receive(DatagramSocket.java:817)
at sun.security.krb5.internal.UDPClient.receive(NetClient.java:207)
at sun.security.krb5.KdcComm$KdcCommunication.run(KdcComm.java:390)
at sun.security.krb5.KdcComm$KdcCommunication.run(KdcComm.java:343)
at java.security.AccessController.doPrivileged(Native Method)
at sun.security.krb5.KdcComm.send(KdcComm.java:327)
at sun.security.krb5.KdcComm.send(KdcComm.java:219)
at sun.security.krb5.KdcComm.send(KdcComm.java:191)
at sun.security.krb5.KrbAsReqBuilder.send(KrbAsReqBuilder.java:319)
at sun.security.krb5.KrbAsReqBuilder.action(KrbAsReqBuilder.java:364)
at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Krb5LoginModule.java:725)
... 15 more

Root cause:
When creating localkdc-krb5.conf in class sun/security/krb5/auto/KDC.java using following method:
 private static String realmLineForKDC(KDC kdc) {
       return String.format(" %s = {\n kdc = %s:%d\n }\n",
             kdc.realm,
             kdc.kdc,
             kdc.port);
}
In localkdc-krb5.conf, the port number are displayed as question marks:
  RABBIT.HOLE = {
    kdc = kdc.rabbit.hole:?????
  }
That is because: In Hindi locale, above String.format using default locale to format the strings, the placeholder %d will be replaced by Hindi numbers. When writing into localkdc-krb5.conf: L431, L432 in KDC.java
FileOutputStream fos = new FileOutputStream(f);
 fos.write(sb.toString().getBytes());
the method use platform's default charset, not UTF-8, so the Hindi numbers are displayed as question marks.

Suggested Fix:
1. If possible, make the test locale independent.
or
2. Replace String.format method with StringBuilder.