sun/security/tools/jarsigner/TsacertOptionTest.java fails Intermittently with "java.net.SocketException: Unexpected end of file from server"

Test: sun/security/tools/jarsigner/TsacertOptionTest.java

Log:
Command line: [/export/home/aginfra/CommonData/jdk/bin/jarsigner -J-Duser.language=en -J-Duser.country=US -J-Dhttp.proxyHost= -J-Dhttp.proxyPort= -J-Djava.net.useSystemProxies= -verbose -keystore keystore.jks -storepass changeit -keypass changeit -signedjar signed.jar -tsacert ts -tsadigestalg SHA-1 unsigned.jar sign_alias]
requesting a signature timestamp
TSA certificate: X.509, CN=TSA
 updating: META-INF/MANIFEST.MF
jarsigner: unable to sign jar: java.net.SocketException: Unexpected end of file from server

----------System.err:(23/1094)----------
 stdout: [requesting a signature timestamp
TSA certificate: X.509, CN=TSA
 updating: META-INF/MANIFEST.MF
jarsigner: unable to sign jar: java.net.SocketException: Unexpected end of file from server
];
 stderr: []
 exitValue = 1