[SPRING] Spring WebApp에서 Elasticsearch 클라이언트를 사용할 때의 링크 오류

Spring WebApp에서 Elasticsearch 클라이언트를 사용할 때의 링크 오류

웹 애플리케이션에 Elasticsearch Java 클라이언트를 포함 시키려고 할 때 문제점이 있습니다. 필자는 필요한 의존성을 가지고 있으며 다음과 같이 Spring Bean을 초기화 / 삭제할 때 클라이언트 (간단한 테스트로서)를 생성합니다.

    @Override
public void afterPropertiesSet() throws Exception {
    try {
        client = new TransportClient();
        InetSocketTransportAddress addr = new InetSocketTransportAddress("localhost", 9300);
        ((TransportClient) client).addTransportAddress(addr);
    } 
    catch(Exception e){
        System.out.println(e.toString());
    }
}

해당 destroy ()는 클라이언트를 닫습니다.

모든 것은 괜찮아 보입니다. 컨텍스트가 잘 시작되지만 JSP에 액세스 할 때 다음과 같은 예외가 발생합니다.

SEVERE: Servlet.service() for servlet [jsp] in context with path [/Fountain] threw           exception [Filter execution threw an exception] with root cause
java.lang.LinkageError: loader constraint violation in interface itable initialization: when resolving method "javax.servlet.ServletResponseWrapper.getOutputStream()Ljavax/servlet/ServletOutputStream;" the class loader (instance of org/apache/catalina/loader/WebappClassLoader) of the current class, javax/servlet/ServletResponseWrapper, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for interface javax/servlet/ServletResponse have different Class objects for the type vlet/ServletOutputStream; used in the signature
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:186)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:181)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:581)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)

Jan 10, 2014 10:44:46 AM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.LinkageError: loader constraint violation: when resolving method "javax.servlet.jsp.JspFactory.getPageContext(Ljavax/servlet/Servlet;Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Ljava/lang/String;ZIZ)Ljavax/servlet/jsp/PageContext;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/jsp/ajaxerror_jsp, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspFactory, have different Class objects for the type t/ServletRequest;Ljavax/servlet/ServletResponse;Ljava/lang/String;ZIZ)Ljavax/servlet/jsp/PageContext; used in the signature
at org.apache.jsp.jsp.ajaxerror_jsp._jspService(ajaxerror_jsp.java:59)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:489)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:467)
at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:412)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:201)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)

Jan 10, 2014 10:44:46 AM org.apache.catalina.core.StandardHostValve custom
SEVERE: Exception Processing ErrorPage[exceptionType=java.lang.Throwable,      location=/jsp/ajaxerror.jsp]
org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.LinkageError: loader constraint violation: when resolving method "javax.servlet.jsp.JspFactory.getPageContext(Ljavax/servlet/Servlet;Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Ljava/lang/String;ZIZ)Ljavax/servlet/jsp/PageContext;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/jsp/ajaxerror_jsp, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspFactory, have different Class objects for the type t/ServletRequest;Ljavax/servlet/ServletResponse;Ljava/lang/String;ZIZ)Ljavax/servlet/jsp/PageContext; used in the signature
at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:489)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:467)
at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:412)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:201)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)
Caused by: javax.servlet.ServletException: java.lang.LinkageError: loader constraint violation: when resolving method    "javax.servlet.jsp.JspFactory.getPageContext(Ljavax/servlet/Servlet;Ljavax/servlet/ServletR equest;Ljavax/servlet/ServletResponse;Ljava/lang/String;ZIZ)Ljavax/servlet/jsp/PageContext;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/jsp/ajaxerror_jsp, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspFactory, have different Class objects for the type t/ServletRequest;Ljavax/servlet/ServletResponse;Ljava/lang/String;ZIZ)Ljavax/servlet/jsp/PageContext; used in the signature
at org.apache.jsp.jsp.ajaxerror_jsp._jspService(ajaxerror_jsp.java:130)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
... 22 more
Caused by: java.lang.LinkageError: loader constraint violation: when resolving method "javax.servlet.jsp.JspFactory.getPageContext(Ljavax/servlet/Servlet;Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Ljava/lang/String;ZIZ)Ljavax/servlet/jsp/PageContext;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/jsp/ajaxerror_jsp, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspFactory, have different Class objects for the type t/ServletRequest;Ljavax/servlet/ServletResponse;Ljava/lang/String;ZIZ)Ljavax/servlet/jsp/PageContext; used in the signature
at org.apache.jsp.jsp.ajaxerror_jsp._jspService(ajaxerror_jsp.java:59)
... 25 more

이것이 없으면 컨텍스트가 시작되고 JSP가 올바르게 제공됩니다.

누구든지이 문제의 원인이 될 수있는 아이디어가 있습니까? elasticsearch 클라이언트가 web-app에 필요한 클래스를 사용하고 있지만 다른 클래스 로더에 instatiating한다고 가정합니다.

ImmutableSettings를 사용하여 탄성 검색에 사용되는 클래스 로더를 명시 적으로 설정하려고 시도했지만 아무런 차이가없는 것으로 보입니다.

    ClassLoader contextClassLoader = thread.getContextClassLoader();
    try {
        //thread.setContextClassLoader(ClassLoader.getSystemClassLoader());
        Settings s = ImmutableSettings.settingsBuilder()
                .classLoader(contextClassLoader)
                .build();   

어떤 도움을 주시면 감사하겠습니다! 감사!

해결법

1. ==============================

   1.확인을 통해이 문제를 해결할 수있었습니다.

   확인을 통해이 문제를 해결할 수있었습니다.

   바람둥이 '공통'클래스 로더를 참조하여 Elasticsearch 클라이언트에게 전달합니다.

   ClassLoader contextClassLoader = thread.getContextClassLoader();
   try {
           Settings settings = ImmutableSettings.settingsBuilder().classLoader(contextClassLoader.getParent()).build();            
           client = new TransportClient(settings);
   

   이것의 부작용은 names.txt 파일이 elasticSearch jar에서 'common'classpath 어딘가로 옮겨 져야한다는 것입니다.

   나는 여전히이 문제가 내 특정 스택에만 영향을 미치고 다른 스택에는 영향을주지 않는 이유를 추적하지 못했다.

2. ==============================

   2.해결 방법은 다음과 같이 elasticsearch 클라이언트를 만드는 것입니다.

   해결 방법은 다음과 같이 elasticsearch 클라이언트를 만드는 것입니다.

   Settings settings = ImmutableSettings.settingsBuilder()
   .put(“path.plugins”, “fakeDirectory:\\”)
   .build();
   
   TransportClient client = new TransportClient(settings);
   

   ElasticSearch가 모든 이클립스 플러그인을로드하기 시작할 때 사용하기 때문에 나는 위조 된 디렉토리를 두었지만 왜 그런지는 알지 못한다 !! (org.elasticsearch.plugins.PluginsService 클래스 참조).

from https://stackoverflow.com/questions/21043128/linkage-error-when-using-elasticsearch-client-in-spring-webapp by cc-by-sa and MIT license