I am having -failOnError and changed the log to Trace. Below is more detailed logging of error.
[java] Rotating PersistentUnitCache file because only 0 files were added.
[java] [WARN] Warnings in 'jar:file:/C:/Pratik/ETD/Import/SmartClient/SmartGWT/4.1/lib/smartgwtpro.jar!/com/smartgwt/client/widgets/calendar/Calendar.java'
[java] [WARN] Line 3352: Referencing deprecated class 'com.smartgwt.client.widgets.calendar.events.EventHoverHTMLEvent'
[java] Tracing compile failure path for type 'java.io.FilterOutputStream'
[java] [ERROR] Errors in 'jar:file:/C:/Pratik/ETD/Import/Google/GWT/2.9.0/gwt-user.jar!/com/google/gwt/emul/java/io/FilterOutputStream.java'
[java] [ERROR] Line 74: The constructor IOException(Throwable) is undefined
[java] Tracing compile failure path for type 'java.util.regex.Pattern'
[java] [ERROR] Errors in 'jar:file:/C:/Pratik/ETD/Import/Google/gwtx/1.5.2/gwtx-1.5.2.jar!/com/googlecode/gwtx/java/util/emul/java/util/regex/Pattern.java'
[java] [ERROR] Line 183: Referencing class 'com.googlecode.gwtx.java.util.emul.java.util.regex.Pattern': unable to resolve class
[java] [ERROR] Line 194: Referencing class 'com.googlecode.gwtx.java.util.emul.java.util.regex.Pattern': unable to resolve class
[java] [ERROR] Line 149: Referencing class 'com.googlecode.gwtx.java.util.emul.java.util.regex.Pattern': unable to resolve class
[java] [ERROR] Line 140: Referencing class 'com.googlecode.gwtx.java.util.emul.java.util.regex.Pattern': unable to resolve class
[java] Removing invalidated units
[java] Resolving com.dclear.cmn.caa.domain1.AccessLevel
[java] Found type 'com.dclear.cmn.caa.domain1.AccessLevel'
[java] [ERROR] Unable to find class java/lang/Enum