Java 在DevMode中看到细枝加载错误，但在GAE中没有看到

我在本地开发模式中看到了一个异常，当尝试使用Twig（见下文）加载时，我们在Live GAE中没有看到这个异常

我的同事也没有看到它，但我们有相同的开发设置 （尽管他在Mac上运行）

它失败的项目是

ArrayList

其中

ContactStatus

是一个简单的枚举（见下文），模型如下 声明

List<ContactStatus> contactStatuses = new ArrayList<ContactStatus>();

我们在开发模式下看到的异常

java.lang.IllegalArgumentException: Cannot compare [SimpleProperty value=[Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored] path=contactStatuses indexed=false] with [SimpleProperty value=[Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored] path=contactStatuses indexed=false]
at com.google.code.twig.util.PropertyComparator.compare(PropertyComparator.java:23)
at com.google.code.twig.util.PropertyComparator.compare(PropertyComparator.java:7)
at java.util.TreeMap.compare(TreeMap.java:1188)
at java.util.TreeMap.put(TreeMap.java:531)
at java.util.TreeSet.add(TreeSet.java:255)
at java.util.AbstractCollection.addAll(AbstractCollection.java:334)
at java.util.TreeSet.addAll(TreeSet.java:312)
at com.google.code.twig.standard.StandardDecodeCommand.entityToInstance(StandardDecodeCommand.java:60)
at com.google.code.twig.standard.StandardDecodeCommand.keyToInstance(StandardDecodeCommand.java:127)
at com.google.code.twig.standard.StandardSingleTypedLoadCommand.keyToInstance(StandardSingleTypedLoadCommand.java:9)
at com.google.code.twig.standard.StandardSingleTypedLoadCommand.now(StandardSingleTypedLoadCommand.java:34)
at com.google.code.twig.standard.TranslatorObjectDatastore.load(TranslatorObjectDatastore.java:202)
at com.recruitmentlink.server.persistence.twig.TwigProfileImpl.getExistingCandidate(TwigProfileImpl.java:92)

下面是John Patterson关于这个问题的（超级快速）回复，以及抑制这个不必要的“异常”的相关代码“修复”

这个问题只影响使用Java7的人

由于GAE部署运行的是Java 6，我们在live中看不到这个问题

java.lang.IllegalArgumentException: Cannot compare [SimpleProperty value=[Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored] path=contactStatuses indexed=false] with [SimpleProperty value=[Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored] path=contactStatuses indexed=false]
at com.google.code.twig.util.PropertyComparator.compare(PropertyComparator.java:23)
at com.google.code.twig.util.PropertyComparator.compare(PropertyComparator.java:7)
at java.util.TreeMap.compare(TreeMap.java:1188)
at java.util.TreeMap.put(TreeMap.java:531)
at java.util.TreeSet.add(TreeSet.java:255)
at java.util.AbstractCollection.addAll(AbstractCollection.java:334)
at java.util.TreeSet.addAll(TreeSet.java:312)
at com.google.code.twig.standard.StandardDecodeCommand.entityToInstance(StandardDecodeCommand.java:60)
at com.google.code.twig.standard.StandardDecodeCommand.keyToInstance(StandardDecodeCommand.java:127)
at com.google.code.twig.standard.StandardSingleTypedLoadCommand.keyToInstance(StandardSingleTypedLoadCommand.java:9)
at com.google.code.twig.standard.StandardSingleTypedLoadCommand.now(StandardSingleTypedLoadCommand.java:34)
at com.google.code.twig.standard.TranslatorObjectDatastore.load(TranslatorObjectDatastore.java:202)
at com.recruitmentlink.server.persistence.twig.TwigProfileImpl.getExistingCandidate(TwigProfileImpl.java:92)