The exception below occurs during reading the test results, causing build state 'UNSTABLE'. This only happens since upgrading to 1.554. A downgrade to 1.553 fixes the issue.

Stacktrace:
Failed to read test report file /home/jenkins/workspace/bug-53/test-results/test_error.xml
org.dom4j.DocumentException: Could not load any resource bundle by com.sun.org.apache.xerces.internal.impl.msg.SAXMessages Nested exception: Could not load any resource bundle by com.sun.org.apache.xerces.internal.impl.msg.SAXMessages
at org.dom4j.io.SAXReader.read(SAXReader.java:484)
at org.dom4j.io.SAXReader.read(SAXReader.java:264)
at hudson.tasks.junit.SuiteResult.parse(SuiteResult.java:123)
at hudson.tasks.junit.TestResult.parse(TestResult.java:273)
at hudson.tasks.junit.TestResult.parsePossiblyEmpty(TestResult.java:229)
at hudson.tasks.junit.TestResult.parse(TestResult.java:164)
at hudson.tasks.junit.TestResult.parse(TestResult.java:147)
at hudson.tasks.junit.TestResult.<init>(TestResult.java:123)
at hudson.tasks.junit.JUnitParser$ParseResultCallable.invoke(JUnitParser.java:117)
at hudson.tasks.junit.JUnitParser$ParseResultCallable.invoke(JUnitParser.java:90)
at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2462)
at hudson.remoting.UserRequest.perform(UserRequest.java:118)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:328)
at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.util.MissingResourceException: Could not load any resource bundle by com.sun.org.apache.xerces.internal.impl.msg.SAXMessages
at com.sun.org.apache.xerces.internal.utils.SecuritySupport$7.run(SecuritySupport.java:172)
at com.sun.org.apache.xerces.internal.utils.SecuritySupport$7.run(SecuritySupport.java:164)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.org.apache.xerces.internal.utils.SecuritySupport.getResourceBundle(SecuritySupport.java:164)
at com.sun.org.apache.xerces.internal.util.SAXMessageFormatter.formatMessage(SAXMessageFormatter.java:57)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.getProperty(AbstractSAXParser.java:2065)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.setProperty(SAXParserImpl.java:512)
at org.dom4j.io.SAXHelper.setParserProperty(SAXHelper.java:34)
at org.dom4j.io.SAXReader.configureReader(SAXReader.java:911)
at org.dom4j.io.SAXReader.read(SAXReader.java:463)
... 19 more
Nested exception:
java.util.MissingResourceException: Could not load any resource bundle by com.sun.org.apache.xerces.internal.impl.msg.SAXMessages
at com.sun.org.apache.xerces.internal.utils.SecuritySupport$7.run(SecuritySupport.java:172)
at com.sun.org.apache.xerces.internal.utils.SecuritySupport$7.run(SecuritySupport.java:164)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.org.apache.xerces.internal.utils.SecuritySupport.getResourceBundle(SecuritySupport.java:164)
at com.sun.org.apache.xerces.internal.util.SAXMessageFormatter.formatMessage(SAXMessageFormatter.java:57)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.getProperty(AbstractSAXParser.java:2065)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.setProperty(SAXParserImpl.java:512)
at org.dom4j.io.SAXHelper.setParserProperty(SAXHelper.java:34)
at org.dom4j.io.SAXReader.configureReader(SAXReader.java:911)
at org.dom4j.io.SAXReader.read(SAXReader.java:463)
at org.dom4j.io.SAXReader.read(SAXReader.java:264)
at hudson.tasks.junit.SuiteResult.parse(SuiteResult.java:123)
at hudson.tasks.junit.TestResult.parse(TestResult.java:273)
at hudson.tasks.junit.TestResult.parsePossiblyEmpty(TestResult.java:229)
at hudson.tasks.junit.TestResult.parse(TestResult.java:164)
at hudson.tasks.junit.TestResult.parse(TestResult.java:147)
at hudson.tasks.junit.TestResult.<init>(TestResult.java:123)
at hudson.tasks.junit.JUnitParser$ParseResultCallable.invoke(JUnitParser.java:117)
at hudson.tasks.junit.JUnitParser$ParseResultCallable.invoke(JUnitParser.java:90)
at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2462)
at hudson.remoting.UserRequest.perform(UserRequest.java:118)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:328)
at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)