的OutOfMemoryError而使用的HtmlUnit拆解

我使用的HtmlUnit登錄到一個站點，然後從該表的OutOfMemoryError而使用的HtmlUnit拆解

下載數據，當我運行我的代碼是導致java.lang.OutOfMemoryError，不能再運行。

以下是我的代碼：

WebClient webClient = new WebClient(BrowserVersion.INTERNET_EXPLORER_6); 
webClient.getOptions().setJavaScriptEnabled(true); 
webClient.getOptions().setCssEnabled(false); 
webClient.getOptions().setRedirectEnabled(true); 
webClient.getCookieManager().setCookiesEnabled(true); 
          webClient.getOptions().setPrintContentOnFailingStatusCode(false); 
webClient.setAjaxController(new NicelyResynchronizingAjaxController()); 
webClient.getOptions().setTimeout(50000); 
webClient.getOptions().setUseInsecureSSL(true); 
webClient.getOptions().setPopupBlockerEnabled(true); 

HtmlPage htmlPage=webClient.getPage(url); 
Thread.sleep(200); 
          //~~~~~~~Log-In 
HtmlTextInput uname=(HtmlTextInput)htmlPage.getFirstByXPath("//*[@id=\"username\"]"); 
uname.setValueAttribute("xxx"); 
HtmlPasswordInput upass=(HtmlPasswordInput)htmlPage.getFirstByXPath("//*[@id=\"password\"]"); 
upass.setValueAttribute("xxx"); 
HtmlSubmitInput submit=(HtmlSubmitInput)htmlPage.getFirstByXPath("//*[@id=\"login-button\"]/input"); 
htmlPage=(HtmlPage) submit.click(); 
Thread.sleep(200); 
webClient.waitForBackgroundJavaScript(10000); 
for (int i = 0; i < 250; i++) { 
if (!htmlPage.asText().contains("Loading...")) { 
    break; 
    } 
    synchronized (htmlPage) { 
    htmlPage.wait(500); 
} 
} 

System.out.println(htmlPage.asText());

和以下是堆棧跟蹤

java.lang.OutOfMemoryError: Java heap space 
at net.sourceforge.htmlunit.corejs.javascript.Node.newString(Node.java:155) 
at net.sourceforge.htmlunit.corejs.javascript.Node.newString(Node.java:151) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.createPropertyGet(IRFactory.java:1990) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformPropertyGet(IRFactory.java:968) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:106) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformPropertyGet(IRFactory.java:964) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:106) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformPropertyGet(IRFactory.java:964) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:106) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformFunctionCall(IRFactory.java:595) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:86) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformInfix(IRFactory.java:775) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:161) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformAssignment(IRFactory.java:368) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:152) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformExprStmt(IRFactory.java:488) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:149) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformBlock(IRFactory.java:406) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:82) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformIf(IRFactory.java:762) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:110) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformBlock(IRFactory.java:406) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:82) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformIf(IRFactory.java:762) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:110) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformBlock(IRFactory.java:406) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:82) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformIf(IRFactory.java:768) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:110) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformBlock(IRFactory.java:406) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transform(IRFactory.java:82) 
at net.sourceforge.htmlunit.corejs.javascript.IRFactory.transformFunction(IRFactory.java:560)

我已經把follwoing線catlina.sh文件配發的堆內存不過還是我收到了同樣的錯誤（我的RAM大小是2GB）。

if [ -z "$LOGGING_MANAGER" ]; then 
    JAVA_OPTS="$JAVA_OPTS -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager" 
else 
    JAVA_OPTS="$JAVA_OPTS $LOGGING_MANAGER" 
fi 

# Uncomment the following line to make the umask available when using the 
# org.apache.catalina.security.SecurityListener 
    JAVA_OPTS="$JAVA_OPTS -Dorg.apache.catalina.security.SecurityListener.UMASK=`umask`" 
    JAVA_OPTS="$JAVA_OPTS -Xms512m -Xmx2048m -XX:MaxPermSize=512m" 
    JAVA_OPTS="-server -XX:+UseConcMarkSweepGC"

來源

2013-04-05 Kunal Kishore

看着堆棧跟蹤，你可以看到，它的遞歸了很多。這似乎不是整個堆棧跟蹤 - 你截斷了多少？ – 2013-04-08 10:58:14

我只把原因從堆棧跟蹤 – 2013-04-08 11:04:35

在這個堆棧跟蹤沒有你的代碼的跡象，這就是爲什麼我說你已經截斷了它。在某些時候，你的代碼應該有一行（或者一行代表類似... 1234更多行） – 2013-04-08 11:07:24

您包括此在代碼最後一行$ JAVA_OPTS，可能你的代碼工作

JAVA_OPTS="$JAVA_OPTS -server -XX:+UseConcMarkSweepGC"

來源

2013-04-08 12:23:16

謝謝rajendra ...我有在catlina.sh中錯誤地寫了最後一行我改變了它。現在感謝了。 – 2013-04-08 12:40:11

我會成立-XX:+HeapDumpOnOutOfMemoryError，然後使用工具像Eclipse MAT。

來源

2013-04-08 11:07:28

的OutOfMemoryError而使用的HtmlUnit拆解

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