我正在尝试使用Struts-2部署一个Web应用程序，该应用程序从两个Excel工作表中读取大约40mb文件的数据并更新它，我将它部署到Jboss-5但是我得到java.lang.OutOfMemoryError: GC overhead limit exceeded错误。
当我通过Netbeans运行我的简单Java应用程序时的相同脚本;最初我遇到了同样的问题但我通过将-Xmx值增加到2g来增加Java堆内存，然后脚本运行正常。
我尝试在Jboss中增加-Xmx值，但有些人再次投掷java.lang.OutOfMemoryError: GC overhead limit exceeded" error。
以下是完整的堆栈跟踪。
java.lang.OutOfMemoryError: GC overhead limit exceeded
at org.apache.poi.hssf.record.aggregates.ValueRecordsAggregate.addMultipleBlanks(ValueRecordsAggregate.java:159)
at org.apache.poi.hssf.record.aggregates.RowRecordsAggregate.<init>(RowRecordsAggregate.java:103)
at org.apache.poi.hssf.model.InternalSheet.<init>(InternalSheet.java:208)
at org.apache.poi.hssf.model.InternalSheet.createSheet(InternalSheet.java:163)
at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:296)
at com.zaxis.tm.utils.ExcelParser.readXldata(ExcelParser.java:84)
at com.zaxis.tm.action.UploadFile.execute(UploadFile.java:231)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:404)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:267)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:229)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:221)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:150)
at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:48)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
我遇到问题的方法是
public boolean readXldata(String path,UpdateBean term) {
logger.info("%%%%%%%%%%%%%%%% Inside Reading Export main Fle %%%%%%%%%%%%%%%%");
ExportBean video = null;
HSSFRow myRow = null;
boolean status = false;
ProcessMethods methds = new ProcessMethods();
try{
if(myFileSystem == null){
myFileSystem = new NPOIFSFileSystem(new File(path));
}
if (myWorkBook == null){
myWorkBook = new HSSFWorkbook(myFileSystem.getRoot(),true);
}
if (mySheet == null){
mySheet = myWorkBook.getSheetAt(0);
}
if(mySheet.isColumnHidden(2)){
mySheet.setColumnHidden(2, false);
}
Iterator rowIter = mySheet.rowIterator();
int start = term.getStart_index();
logger.info("TARGET LANG START INDEX ::" +start+ "LAST INDEX ::" +term.getEnd_index());
while(rowIter.hasNext()){
flag = 0;
myRow = (HSSFRow) rowIter.next();
int id = 0;
try{
id = new Double(myRow.getCell(0).toString().trim()).intValue();
logger.info("ID ::" +myRow.getCell(0));
}catch(NumberFormatException nex){
logger.info("\nNUMBER FORMAT EXCEPTION WHIILE READING CONTENT ENTRY IN FILE ::");
continue;
}
}else{
logger.info("\nNUMBER FORMAT EXCEPTION WHIILE READING CONTENT ENTRY IN FILE ::");
continue;
}
video = new ExportBean();
video.setConcept(id);
int Rownum =myRow.getRowNum();
video.setRowno_ex(Rownum);
int LastRow = mySheet.getPhysicalNumberOfRows() - 7 ;
if(myRow.getCell(1)!=null && !myRow.getCell(1).toString().equals("")){
video.setEntryclass(myRow.getCell(1).toString().trim());
}
flag=0;
logger.info("LAST ROW NUMBER ::" +LastRow+" ROW NUMBER ::" +Rownum+ "FLAG ::" +flag);
if(term.getEnglish_term().equalsIgnoreCase(video.getEng_term())){
flag = 1;
if(!term.getTarget_term().equalsIgnoreCase(video.getTar_term())){
logger.info("Termlist English term is same to Export main english term");
logger.info("Termlist English term" +term.getTarget_term()+" is not same to Export main english term");
if(this.Update_Row(video,term)){
logger.info(" ############ ROW NO::"+ video.getRowno_ex() + "SUCCESSFULLY UPDATED #######");
status = true;
return status;
}else{
logger.info(" ############ UPDATION FAILED #########");
return status;
}
}
}else if (LastRow == Rownum && flag == 0){
logger.info("Reached to end of the row");
if(Insert_Row(video,term)){
logger.info("Insertion done successfully at row "+ mySheet.getLastRowNum());
return status=true;
}else{
logger.info("Failed to insert values at the last row");
return status;
}
}
logger.info("Termlist Eng term is not same to main term " +video.getEng_term()+ " Continue with the process.......");
continue;
}
myFileSystem.close();
} catch (Exception e) {
e.printStackTrace();
}
return status;
}
答案 0 :(得分：2)
超出GC开销限制意味着JVM花费太多时间进行垃圾收集，这通常意味着您没有足够的内存。 所以你可能有内存泄漏，你应该启动jconsole或jprofiler并将它连接到你的jboss并在它运行时监视内存使用情况。
还可以帮助解决此问题的方法是暂时将内存（Xmx）增加到可以节省的时间。因为如果你可以延迟内存不足，你将有更多时间找到潜在的泄漏