dom4j/log4j造成线程挂起

 

DOM4J线程挂起信息

 

"MyService.91" prio=10 tid=0x00002aab4034b000 nid=0x4df4 waiting for monitor entry [0x00002aab3fddb000]

   java.lang.Thread.State: BLOCKED (on object monitor)

at java.util.zip.ZipFile.getEntry(ZipFile.java:147)

- waiting to lock <0x00002aaab9505aa8> (a java.util.jar.JarFile)

at java.util.jar.JarFile.getEntry(JarFile.java:206)

at java.util.jar.JarFile.getJarEntry(JarFile.java:189)

at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:754)

at sun.misc.URLClassPath$JarLoader.findResource(URLClassPath.java:732)

at sun.misc.URLClassPath.findResource(URLClassPath.java:145)

at java.net.URLClassLoader$2.run(URLClassLoader.java:362)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findResource(URLClassLoader.java:359)

at java.lang.ClassLoader.getResource(ClassLoader.java:958)

at java.lang.ClassLoader.getResourceAsStream(ClassLoader.java:1148)

at org.apache.xerces.parsers.SecuritySupport$6.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at org.apache.xerces.parsers.SecuritySupport.getResourceAsStream(Unknown Source)

at org.apache.xerces.parsers.ObjectFactory.findJarServiceProvider(Unknown Source)

at org.apache.xerces.parsers.ObjectFactory.createObject(Unknown Source)

at org.apache.xerces.parsers.ObjectFactory.createObject(Unknown Source)

at org.apache.xerces.parsers.SAXParser.(Unknown Source)

at org.apache.xerces.parsers.SAXParser.(Unknown Source)

at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.(Unknown Source)

at org.apache.xerces.jaxp.SAXParserImpl.(Unknown Source)

at org.apache.xerces.jaxp.SAXParserFactoryImpl.newSAXParser(Unknown Source)

at org.dom4j.io.JAXPHelper.createXMLReader(JAXPHelper.java:50)

at org.dom4j.io.SAXHelper.createXMLReaderViaJAXP(SAXHelper.java:125)

at org.dom4j.io.SAXHelper.createXMLReader(SAXHelper.java:78)

at org.dom4j.io.SAXReader.createXMLReader(SAXReader.java:894)

at org.dom4j.io.SAXReader.getXMLReader(SAXReader.java:715)

at org.dom4j.io.SAXReader.read(SAXReader.java:435)

at org.dom4j.DocumentHelper.parseText(DocumentHelper.java:278)

 

 

参照http://tech.ddvip.com/2009-09/1253614257133975.html避免了getEntry锁的问题，但是又出现新的Blocked

 

"servce-30" prio=10 tid=0x00002aab41afe000 nid=0xbc8 waiting for monitor entry [0x000000004b0b6000]

   java.lang.Thread.State: BLOCKED (on object monitor)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:293)

- waiting to lock <0x00002aaabb244290> (a sun.misc.Launcher$AppClassLoader)

at java.lang.ClassLoader.loadClass(ClassLoader.java:248)

at javax.xml.parsers.FactoryFinder.getProviderClass(FactoryFinder.java:111)

at javax.xml.parsers.FactoryFinder.newInstance(FactoryFinder.java:146)

at javax.xml.parsers.FactoryFinder.find(FactoryFinder.java:187)

at javax.xml.parsers.SAXParserFactory.newInstance(SAXParserFactory.java:128)

at org.dom4j.io.JAXPHelper.createXMLReader(JAXPHelper.java:46)

at org.dom4j.io.SAXHelper.createXMLReaderViaJAXP(SAXHelper.java:125)

at org.dom4j.io.SAXHelper.createXMLReader(SAXHelper.java:78)

at org.dom4j.io.SAXReader.createXMLReader(SAXReader.java:894)

at org.dom4j.io.SAXReader.getXMLReader(SAXReader.java:715)

at org.dom4j.io.SAXReader.read(SAXReader.java:435)

at org.dom4j.io.SAXReader.read(SAXReader.java:365)

 

最终解决方案是org.dom4j.io.JAXPHelper的方法

    public static XMLReader createXMLReader(boolean validating,

            boolean namespaceAware) throws Exception {

        //SAXParserFactory factory = SAXParserFactory.newInstance();

SAXParserFactory factory = new org.apache.xerces.jaxp.SAXParserFactoryImpl();

        factory.setValidating(validating);

        factory.setNamespaceAware(namespaceAware);

 

        SAXParser parser = factory.newSAXParser();

 

        return parser.getXMLReader();

    }

    public static org.w3c.dom.Document createDocument(boolean validating,

            boolean namespaceAware) throws Exception {

        //DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

        DocumentBuilderFactory factory = new org.apache.xerces.jaxp.DocumentBuilderFactoryImpl

()

        factory.setValidating(validating);

        factory.setNamespaceAware(namespaceAware);

 

        DocumentBuilder builder = factory.newDocumentBuilder();

 

        return builder.newDocument();

    }

 

LOG4J线程挂起信息

 

"MyService.76" prio=10 tid=0x00002aab40ebf000 nid=0x4d52 waiting for monitor entry [0x000000007a60c000]

   java.lang.Thread.State: BLOCKED (on object monitor)

at org.apache.log4j.Category.callAppenders(Category.java:201)

- waiting to lock <0x00002aaabd724fd0> (a org.apache.log4j.Logger)

at org.apache.log4j.Category.forcedLog(Category.java:388)

at org.apache.log4j.Category.info(Category.java:663)

 

 

dbcp线程挂起信息

 

"MyService-85" prio=10 tid=0x00002aab39af3000 nid=0x68a4 waiting for monitor entry [0x000000005a444000]

   java.lang.Thread.State: BLOCKED (on object monitor)

at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:294)

- waiting to lock <0x00002aaaba871308> (a org.apache.commons.dbcp.PoolableConnectionFactory)

at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:974)

at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:96)

at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)