java.lang.IllegalArgumentException: n must be positive
2015-05-25 11:12
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Exceptioninthread"main"java.lang.IllegalArgumentException:nmustbepositive atjava.util.Random.nextInt(Random.java:300) atcom.stresstest.example.RandomTest.randomKey(RandomTest.java:24) atcom.stresstest.example.RandomTest.main(RandomTest.java:15)异常说明:
java.lang.IllegalArgumentException:nmustbepositive 参数异常,n必须是一个整数,显然(int)System.currentTimeMillis()产生的值不是一个正数。 分析: 系统产生的异常,测试时系统正常,上线之后某一天之后产生了异常。 查看System.currentTimeMillis()产生了问题,产生异常时间是2015-05-23当天开始往后,一直报错。之前就没事 时间:2015-05-23 测试结果:正常
System.currentTimeMillis():1432350368523 (int)System.currentTimeMillis():2126349176 randomKey():1369912950
-2082194224
Exceptioninthread"main"java.lang.IllegalArgumentException:nmustbepositive atjava.util.Random.nextInt(Random.java:300) atcom.stresstest.example.RandomTest.randomKey(RandomTest.java:24) atcom.stresstest.example.RandomTest.main(RandomTest.java:15)
因此可以知道结果,阴性问题,值得注意,至于long型转换为int型出现问题在这里不做深究,有这个问题深层研究的请补充。解决办法:
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