ssh的网站经常卡死，麻烦高人来看下，这是日志，希望高人指点，谢谢

[csfengping]

2010-10-13 1:08:16 org.apache.catalina.core.ApplicationDispatcher invoke
严重: Servlet.service() for servlet action threw exception
java.lang.OutOfMemoryError: Java heap space
2010-10-13 1:08:18 org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler process
严重: Error reading request, ignored
java.lang.OutOfMemoryError: GC overhead limit exceeded
2010-10-13 1:08:18 org.apache.catalina.core.ApplicationDispatcher invoke
严重: Servlet.service() for servlet action threw exception
java.lang.OutOfMemoryError: GC overhead limit exceeded
at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:39)
at java.nio.ByteBuffer.allocate(ByteBuffer.java:312)
at sun.nio.cs.StreamDecoder.<init>(StreamDecoder.java:231)
at sun.nio.cs.StreamDecoder.<init>(StreamDecoder.java:211)
at sun.nio.cs.StreamDecoder.forInputStreamReader(StreamDecoder.java:50)
at java.io.InputStreamReader.<init>(InputStreamReader.java:83)
at com.microsoft.sqlserver.jdbc.DDC.convertNonUnicodeNonPLPToObject(Unknown Source)
at com.microsoft.sqlserver.jdbc.ServerDTVImpl.getValue(Unknown Source)
at com.microsoft.sqlserver.jdbc.DTV.getValue(Unknown Source)
at com.microsoft.sqlserver.jdbc.Column.getValue(Unknown Source)
at com.microsoft.sqlserver.jdbc.Column.getValue(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getString(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getString(Unknown Source)
at org.hibernate.type.StringType.get(StringType.java:18)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:163)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:154)
at org.hibernate.type.AbstractType.hydrate(AbstractType.java:81)
at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2096)
at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1380)
at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1308)
at org.hibernate.loader.Loader.getRow(Loader.java:1206)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:580)
at org.hibernate.loader.Loader.doQuery(Loader.java:701)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
at org.hibernate.loader.Loader.doList(Loader.java:2220)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
at org.hibernate.loader.Loader.list(Loader.java:2099)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:378)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338)
at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)

[csfengping]

补充问题完毕，大家帮忙看看！！

[yjflinchong]

你的连接池没有配置好吧。 服务器爆了

[sowuqing]

配置一个事物，

[csfengping]

我的qq 474372951 有会的可以详细聊下吗？

[precious]

使用Java程序从数据库中查询大量的数据时出现异常:
java.lang.OutOfMemoryError: Java heap space
在JVM中如果98％的时间是用于GC且可用的 Heap size 不足2％的时候将抛出此异常信息。

JVM堆的设置是指java程序运行过程中JVM可以调配使用的内存空间的设置.JVM在启动的时候会自动设置Heap size的值，其初始空间(即-Xms)是物理内存的1/64，最大空间(-Xmx)是物理内存的1/4。可以利用JVM提供的-Xmn -Xms -Xmx等选项可进行设置。
例如：java -jar -Xmn16m -Xms64m -Xmx128m MyApp.jar
如果Heap Size设置偏小，除了这些异常信息外，还会发现程序的响应速度变慢了。GC占用了更多的时间，而应用分配到的执行时间较少。
Heap Size 最大不要超过可用物理内存的80％，一般的要将-Xms和-Xmx选项设置为相同，而-Xmn为1/4的-Xmx值。
Heap size的 -Xms -Xmn 设置不要超出物理内存的大小。否则会提示“Error occurred during initialization of VM Could not reserve enough space for object heap”。


这个问题的根源是jvm虚拟机的默认Heap大小是64M,可以通过设置其最大和最小值来实现.设置的方法主要是几个.

1.可以在windows 更改系统环境变量
加上JAVA_OPTS=-Xms64m -Xmx512m

2,如果用的tomcat,在windows下,可以在

C:\tomcat5.5.9\bin\catalina.bat 中加上:

set JAVA_OPTS=-Xms64m -Xmx256m

位置在: rem Guess CATALINA_HOME if not defined 这行的下面加合适.

3.如果是linux系统
Linux 在{tomcat_home}/bin/catalina.sh的前面，加
set JAVA_OPTS='-Xms64 -Xmx512'
这是从别的地方查到的东西
你可以试一下看看

仔细检查一下你的代码用这个工具JProfiler查看一下你的内存的问题

[海会圣贤]

java.lang.OutOfMemoryError: Java heap space

性能问题。

没内存了。

[csfengping]

2010-10-13 1:09:07 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jsp threw exception
com.microsoft.sqlserver.jdbc.SQLServerException: TDS 协议流无效。
at com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.throwInvalidTDS(Unknown Source)
at com.microsoft.sqlserver.jdbc.TDSReader.throwInvalidTDS(Unknown Source)
at com.microsoft.sqlserver.jdbc.TDSParser.throwUnexpectedTokenException(Unknown Source)
at com.microsoft.sqlserver.jdbc.TDSParser.parse(Unknown Source)
at com.microsoft.sqlserver.jdbc.TDSParser.parse(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection$1ConnectionCommand.doExecute(Unknown Source)
at com.microsoft.sqlserver.jdbc.TDSCommand.execute(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectionCommand(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.rollback(Unknown Source)
at org.hibernate.transaction.JDBCTransaction.rollbackAndResetAutoCommit(JDBCTransaction.java:183)
at org.hibernate.transaction.JDBCTransaction.rollback(JDBCTransaction.java:162)
at org.springframework.orm.hibernate3.HibernateTransactionManager.doRollback(HibernateTransactionManager.java:577)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processRollback(AbstractPlatformTransactionManager.java:631)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:608)
at org.springframework.transaction.interceptor.TransactionAspectSupport.completeTransactionAfterThrowing(TransactionAspectSupport.java:328)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:111)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:209)
at $Proxy5.selSumNew(Unknown Source)
at com.mycall.actions.IndexAction.first(IndexAction.java:175)
at sun.reflect.GeneratedMethodAccessor756.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:269)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:170)
at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:106)
at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488)
at org.apache.taglibs.standard.tag.common.core.ImportSupport.acquireString(ImportSupport.java:296)
at org.apache.taglibs.standard.tag.common.core.ImportSupport.doEndTag(ImportSupport.java:161)
at org.apache.jsp.index_jsp._jspx_meth_c_005fimport_005f0(index_jsp.java:131)
at org.apache.jsp.index_jsp._jspService(index_jsp.java:90)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:78)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.mycall.filter.WordsFilter.doFilter(WordsFilter.java:27)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.mycall.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:17)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
at java.lang.Thread.run(Thread.java:619)
2010-10-13 1:09:07 org.apache.catalina.core.ApplicationDispatcher invoke
严重: Servlet.service() for servlet action threw exception
com.microsoft.sqlserver.jdbc.SQLServerException: 该连接已关闭。
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.checkClosed(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.getAutoCommit(Unknown Source)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:104)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:423)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:119)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:57)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1326)
at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:494)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:315)
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:257)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:102)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:209)

[function_chk]

是不是数据库连接没关啊, OutOfMemoryError了

[朱超ZhuChao.Tech]

代码你使用了资源之后不释放，内存泄露 导致 垃圾回收GC吃不消 服务器就爆了
严重: Servlet.service() for servlet action threw exception
java.lang.OutOfMemoryError: Java heap space
2010-10-13 1:08:18 org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler process
严重: Error reading request, ignored
java.lang.OutOfMemoryError: GC overhead limit exceeded

.QueryImpl.list

这个查询你是不是查询好之后 SESSION 没关闭？

[csfengping]

还有一个情况，打开SqlServer数据库当中的表有时候，会出现查询超时的情况，表里面才两千条数据 ，一出现这种情况，网站就打不开了。
网站是用ssh写的，
//
public List findEndSummonedByMemId(int userMemId) throws Exception{
List<Summoned> sumList = new ArrayList<Summoned>();
sumList=this.getHibernateTemplate().find("from Summoned s where s.isChecked=1 and s.memId=? and getdate()>s.endDate",userMemId);
return sumList;
}


public List selectSummonedNoCheck(int userMemId) throws Exception{
List<Summoned> sumList = new ArrayList<Summoned>();
sumList=this.getHibernateTemplate().find("from Summoned s where s.isChecked=0 and s.memId=?",userMemId);
return sumList;
}

hibernate的session是经过事务管理的，除非spring出问题，session一定会关闭的。国庆七天一直都是正常的。就是国庆节过来这两天，频繁出现这情况。大家帮帮忙，谢谢了。