java.lang.OutOfMemoryError: Java heap space-如何解决这个错误？
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时间：2020-11-01 01:32:51 来源:igfitidea点击:
java.lang.OutOfMemoryError: Java heap space-How to resolve this error?
提问by Naruto Uzumaki
I am developing a website in JSP(JDK 1.6) and hosting it using apache tomcat7. There is a webpage which takes user input,builds a query and sends it to Lucene Database(20GB in size) and displays the result in a downloadable textfile.However this functionality is not working properly and I get the following exception after I submit the user Input.
我正在 JSP（JDK 1.6）中开发一个网站并使用 apache tomcat7 托管它。有一个网页接受用户输入，构建查询并将其发送到 Lucene 数据库（大小为 20GB）并在可下载的文本文件中显示结果。但是此功能无法正常工作，并且在我提交用户后出现以下异常输入。
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.OutOfMemoryError: Java heap space
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause
javax.servlet.ServletException: java.lang.OutOfMemoryError: Java heap space
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:911)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:840)
org.apache.jsp.Getinfo_jsp._jspService(Getinfo_jsp.java:305)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause
java.lang.OutOfMemoryError: Java heap space
org.apache.lucene.codecs.lucene42.Lucene42DocValuesProducer.loadNumeric(Lucene42DocValuesProducer.java:180)
org.apache.lucene.codecs.lucene42.Lucene42DocValuesProducer.getNumeric(Lucene42DocValuesProducer.java:146)
org.apache.lucene.index.SegmentCoreReaders.getNormValues(SegmentCoreReaders.java:301)
org.apache.lucene.index.SegmentReader.getNormValues(SegmentReader.java:259)
org.apache.lucene.search.similarities.TFIDFSimilarity.exactSimScorer(TFIDFSimilarity.java:760)
org.apache.lucene.search.PhraseQuery$PhraseWeight.scorer(PhraseQuery.java:285)
org.apache.lucene.search.BooleanQuery$BooleanWeight.scorer(BooleanQuery.java:323)
org.apache.lucene.search.BooleanQuery$BooleanWeight.scorer(BooleanQuery.java:323)
org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:603)
org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:482)
org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:438)
org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:281)
org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:269)
com.cde.sentiment.DataCollection.GetTweets(DataCollection.java:76)
com.cde.sentiment.SentimentCalculation.GenerateOutputFile(SentimentCalculation.java:102)
org.apache.jsp.Getinfo_jsp._jspService(Getinfo_jsp.java:154)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.27 logs.
Apache Tomcat/7.0.27
Here's the stacktrace of above exception
这是上述异常的堆栈跟踪
24 Jun, 2013 3:04:35 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [jsp] in context with path [/SentimentAnalysisModule] threw exception [javax.servlet.ServletException: java.lang.OutOfMemoryError: Java heap space] with root cause
java.lang.OutOfMemoryError: Java heap space
at org.apache.lucene.codecs.lucene42.Lucene42DocValuesProducer.loadNumeric(Lucene42DocValuesProducer.java:180)
at org.apache.lucene.codecs.lucene42.Lucene42DocValuesProducer.getNumeric(Lucene42DocValuesProducer.java:146)
at org.apache.lucene.index.SegmentCoreReaders.getNormValues(SegmentCoreReaders.java:301)
at org.apache.lucene.index.SegmentReader.getNormValues(SegmentReader.java:259)
at org.apache.lucene.search.similarities.TFIDFSimilarity.exactSimScorer(TFIDFSimilarity.java:760)
at org.apache.lucene.search.PhraseQuery$PhraseWeight.scorer(PhraseQuery.java:285)
at org.apache.lucene.search.BooleanQuery$BooleanWeight.scorer(BooleanQuery.java:323)
at org.apache.lucene.search.BooleanQuery$BooleanWeight.scorer(BooleanQuery.java:323)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:603)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:482)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:438)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:281)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:269)
at com.cde.sentiment.DataCollection.GetTweets(DataCollection.java:76)
at com.cde.sentiment.SentimentCalculation.GenerateOutputFile(SentimentCalculation.java:102)
at org.apache.jsp.Getinfo_jsp._jspService(Getinfo_jsp.java:154)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
回答by zacheusz
Your code with Lucene consumes more memory than declared for the heap. It may not be an error (leak) but only a configuration issue (not enough memory).
您使用 Lucene 的代码消耗的内存比为堆声明的内存多。这可能不是错误（泄漏），而只是配置问题（内存不足）。
Try using
-Xmxto increase the heap size. For Apache Tomcat use i.e.export CATALINA_OPTS="-Xmx1024M"Find how memory is used using some profiling tool i.e.
VisualVMwhich is bundled with Oracle JDK.
尝试使用
-Xmx增加堆大小。对于 Apache Tomcat 使用 ieexport CATALINA_OPTS="-Xmx1024M"使用一些分析工具（即
VisualVM与 Oracle JDK 捆绑在一起）了解如何使用内存。
