java字符串与collator的奇数行为

在使用

compareIgnoreCase

时，我得到了

NegativeArraySizeException

/'NullPointerException'（在Java 7 JRE中运行）

被称为：

  public static int compareIgnoreCase(String a, String b) {
    return compareIgnoreCase(NlsUtility.getDefaultLocale(), a, b);
  }

NlsUtility.getDefaultLocale：

  public static Locale getDefaultLocale() {
    Locale locale = LocaleThreadLocal.get();
    if (locale == null) {
      locale = Locale.getDefault();
    }
    return locale;
  }

问题似乎又出现了，接着是JVM崩溃。我不知道如何解决这个问题：

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007f1dabb9d4f0, pid=4290, tid=139765228910336
#
# JRE version: Java(TM) SE Runtime Environment (7.0_80-b15) (build 1.7.0_80-b15)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (24.80-b11 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# V  [libjvm.so+0x7ee4f0]  nmethod::can_unload(BoolObjectClosure*, OopClosure*, oopDesc**, bool)+0x70
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /tmp/hs_err_pid4290.log
Compiled method (c2) 191914528 4305  s!         java.text.Collator::getInstance (157 bytes)
 total in heap  [0x00007f1da19f7f90,0x00007f1da19fa8f8] = 10600
 relocation     [0x00007f1da19f80b0,0x00007f1da19f8290] = 480
 constants      [0x00007f1da19f82a0,0x00007f1da19f82c0] = 32
 main code      [0x00007f1da19f82c0,0x00007f1da19f9980] = 5824
 stub code      [0x00007f1da19f9980,0x00007f1da19f9a40] = 192
 oops           [0x00007f1da19f9a40,0x00007f1da19f9b30] = 240
 scopes data    [0x00007f1da19f9b30,0x00007f1da19fa3d0] = 2208
 scopes pcs     [0x00007f1da19fa3d0,0x00007f1da19fa690] = 704
 dependencies   [0x00007f1da19fa690,0x00007f1da19fa6a8] = 24
 handler table  [0x00007f1da19fa6a8,0x00007f1da19fa8d0] = 552
 nul chk table  [0x00007f1da19fa8d0,0x00007f1da19fa8f8] = 40
Compiled method (c2) 191914528 4305  s!         java.text.Collator::getInstance (157 bytes)
 total in heap  [0x00007f1da19f7f90,0x00007f1da19fa8f8] = 10600
 relocation     [0x00007f1da19f80b0,0x00007f1da19f8290] = 480
 constants      [0x00007f1da19f82a0,0x00007f1da19f82c0] = 32
 main code      [0x00007f1da19f82c0,0x00007f1da19f9980] = 5824
 stub code      [0x00007f1da19f9980,0x00007f1da19f9a40] = 192
 oops           [0x00007f1da19f9a40,0x00007f1da19f9b30] = 240
 scopes data    [0x00007f1da19f9b30,0x00007f1da19fa3d0] = 2208
 scopes pcs     [0x00007f1da19fa3d0,0x00007f1da19fa690] = 704
 dependencies   [0x00007f1da19fa690,0x00007f1da19fa6a8] = 24
 handler table  [0x00007f1da19fa6a8,0x00007f1da19fa8d0] = 552
 nul chk table  [0x00007f1da19fa8d0,0x00007f1da19fa8f8] = 40
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.java.com/bugreport/crash.jsp
#

---

在调用Collator.getInstance（locale）之前，必须检查您的locale

检查它是否为null，长度（）或区域设置无效。尝试调试您的应用程序。这将给你一些关于那里发生的事情的建议

---

显然，您的CompareIgnorCase会引发异常（Nullpointer），但我建议调试您的应用程序，因为这是由于您的检查中的代码失败，或者可能是在Collator.getInstance（）…

过程中，此错误似乎导致JVM出现错误。您可以查看是否有类似的问题。

您会因为代码中的错误而出现异常（这是可以自我解释和清楚的）。如果您自己找不到原因，请尝试发布再现问题的最小代码快照。您要为

locale

变量传递什么值？我认为如果

locale

变量为null或不是有效的区域设置，就会发生此错误。我无法使用此代码复制错误，并传递您指定的区域设置。你确定你通过的是那个区域而不是其他区域吗？也许您可以在调用

Collator.getInstance

之前使用调试器检查

locale

的值。好的，我刚刚阅读了您的最后一条评论。我想知道附加调试器是否会影响语言环境。您可以尝试在没有调试器的情况下运行，但将行

System.out.println（LocaleData.getCollationData（locale.getString）（“Rule”）Collator.getInstance

之前的code>。如果这显示为null，那么您的Java运行时中的区域设置数据就有问题，您可能应该转移到以后的Java构建中。也许缓存被破坏了。在这一点上进行验尸是不可能的。对不起，我想这里的任何人都帮不了你。语言环境是使用locale.forLanguageTa设置的‌​在方法调用之前，有一个空检查。如果区域设置为null，它将使用locale.getDefault编辑：我不确定成功实例化的区域设置对象如何具有“无效长度”您是否有日志可以为我们提供一些信息以帮助您？空指针实际上是在java.lang.String.length（String.java:623）处提出的，我想它是从java.text.Collator.getInstance（Collator.java:276）开始的. 我正在读有关forLanguageTa的书‌g（“…”）并且可能您的区域设置实例对于某些奇怪的东西不是格式良好的。很抱歉，我无法提取更多信息。应用程序中只有三种语言环境：nl BE、fr BE、Locale.getDefault。我不知道这三个人有什么奇怪的。它们是有效的区域设置。在代码中没有任何干预的情况下，异常停止发生。

  public static int compareIgnoreCase(String a, String b) {
    return compareIgnoreCase(NlsUtility.getDefaultLocale(), a, b);
  }

  public static Locale getDefaultLocale() {
    Locale locale = LocaleThreadLocal.get();
    if (locale == null) {
      locale = Locale.getDefault();
    }
    return locale;
  }

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007f1dabb9d4f0, pid=4290, tid=139765228910336
#
# JRE version: Java(TM) SE Runtime Environment (7.0_80-b15) (build 1.7.0_80-b15)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (24.80-b11 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# V  [libjvm.so+0x7ee4f0]  nmethod::can_unload(BoolObjectClosure*, OopClosure*, oopDesc**, bool)+0x70
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /tmp/hs_err_pid4290.log
Compiled method (c2) 191914528 4305  s!         java.text.Collator::getInstance (157 bytes)
 total in heap  [0x00007f1da19f7f90,0x00007f1da19fa8f8] = 10600
 relocation     [0x00007f1da19f80b0,0x00007f1da19f8290] = 480
 constants      [0x00007f1da19f82a0,0x00007f1da19f82c0] = 32
 main code      [0x00007f1da19f82c0,0x00007f1da19f9980] = 5824
 stub code      [0x00007f1da19f9980,0x00007f1da19f9a40] = 192
 oops           [0x00007f1da19f9a40,0x00007f1da19f9b30] = 240
 scopes data    [0x00007f1da19f9b30,0x00007f1da19fa3d0] = 2208
 scopes pcs     [0x00007f1da19fa3d0,0x00007f1da19fa690] = 704
 dependencies   [0x00007f1da19fa690,0x00007f1da19fa6a8] = 24
 handler table  [0x00007f1da19fa6a8,0x00007f1da19fa8d0] = 552
 nul chk table  [0x00007f1da19fa8d0,0x00007f1da19fa8f8] = 40
Compiled method (c2) 191914528 4305  s!         java.text.Collator::getInstance (157 bytes)
 total in heap  [0x00007f1da19f7f90,0x00007f1da19fa8f8] = 10600
 relocation     [0x00007f1da19f80b0,0x00007f1da19f8290] = 480
 constants      [0x00007f1da19f82a0,0x00007f1da19f82c0] = 32
 main code      [0x00007f1da19f82c0,0x00007f1da19f9980] = 5824
 stub code      [0x00007f1da19f9980,0x00007f1da19f9a40] = 192
 oops           [0x00007f1da19f9a40,0x00007f1da19f9b30] = 240
 scopes data    [0x00007f1da19f9b30,0x00007f1da19fa3d0] = 2208
 scopes pcs     [0x00007f1da19fa3d0,0x00007f1da19fa690] = 704
 dependencies   [0x00007f1da19fa690,0x00007f1da19fa6a8] = 24
 handler table  [0x00007f1da19fa6a8,0x00007f1da19fa8d0] = 552
 nul chk table  [0x00007f1da19fa8d0,0x00007f1da19fa8f8] = 40
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.java.com/bugreport/crash.jsp
#