Question

Root pom具有以下依赖项，

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.16</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.16</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>3.16</version>
        </dependency>

但是在运行时期间，在etl进程发生跟随错误时，

EJB threw an unexpected (non-declared) exception during invocation of method "****" on bean "BeanId(***-ear#***-ejb.jar#***ServiceImpl, null)". Exception data: java.lang.NoClassDefFoundError: org.apache.poi.util.SAXHelper

以下代码段中的根本原因是NoClassDefFoundError

XMLReader parser = SAXHelper.newXMLReader();

使用环境，

JDK 1.6.0_35
Websphere Application Server v8.0
Eclipse Juno Service Release 2

可在此处找到完整堆栈跟踪

Caused by: java.lang.ClassNotFoundException: org.apache.poi.util.SAXHelper
    at java.net.URLClassLoader.findClass(URLClassLoader.java:434)
    at com.ibm.ws.bootstrap.ExtClassLoader.findClass(ExtClassLoader.java:230)
    at java.lang.ClassLoader.loadClassHelper(ClassLoader.java:703)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:682)
    at com.ibm.ws.bootstrap.ExtClassLoader.loadClass(ExtClassLoader.java:123)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:665)
    at com.ibm.ws.classloader.ProtectionClassLoader.loadClass(ProtectionClassLoader.java:62)
    at com.ibm.ws.classloader.ProtectionClassLoader.loadClass(ProtectionClassLoader.java:58)
    at com.ibm.ws.classloader.CompoundClassLoader.loadClass(CompoundClassLoader.java:566)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:665)
    ... 87 more

注意：我已打开ear存档，并找到了相应的jars。还查看了Eclipse java build path。一切似乎都很好。

感谢。

Answer 1

SAXHelper在poi-ooxml-3.16.jar中。我怀疑这个类中的一个静态初始化器失败了。 https://github.com/apache/poi/blob/trunk/src/ooxml/java/org/apache/poi/util/SAXHelper.java

EJB ETL NoClassDefFoundError：org.apache.poi.util.SAXHelper在运行时

1 个答案: