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java.lang.OutOfMemoryError: Java heap space	at java.util.regex.Pattern.closure(Pattern.java:2737)	at java.util.regex.Pattern.sequence(Pattern.java:1889)	at java.util.regex.Pattern.expr(Pattern.java:1752)	at java.util.regex.Pattern.compile(Pattern.java:1460)	at java.util.regex.Pattern.(Pattern.java:1133)	at java.util.regex.Pattern.compile(Pattern.java:823)	at java.lang.String.split(String.java:2292)	at java.lang.String.split(String.java:2334)	at com.huaban.analysis.jieba.WordDictionary.loadDict(WordDictionary.java:62)	at com.huaban.analysis.jieba.WordDictionary.getInstance(WordDictionary.java:32)	at org.elasticsearch.index.analysis.JiebaAnalyzer.(JiebaAnalyzer.java:88)	at org.elasticsearch.index.analysis.JiebaAnalyzerTest.test(JiebaAnalyzerTest.java:83)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)	at org.junit.runners.ParentRunner.run(ParentRunner.java:236)	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)