SolrJ - 從JSP連接到Zookeeper時出錯

Question

如果我嘗試從運行在webapp中的JSP或Servlet嘗試連接到Zookeeper，則出現錯誤。我正在使用Weblogic應用程序服務器。我的JSP使用SolrJ類CloudSolrServer連接到Zookeeper。

<%@page import="java.io.IOException" %> 
<%@page import="java.io.PrintStream" %> 
<%@page import="java.util.List" %> 
<%@page import="java.util.Map" %> 
<%@page import="org.apache.solr.client.solrj.SolrQuery" %> 
<%@page import="org.apache.solr.client.solrj.SolrQuery.ORDER" %> 
<%@page import="org.apache.solr.client.solrj.SolrServerException" %> 
<%@page import="org.apache.solr.client.solrj.impl.CloudSolrServer" %> 
<%@page import="org.apache.solr.client.solrj.response.QueryResponse" %> 
<%@page import="org.apache.solr.client.solrj.response.SpellCheckResponse" %> 
<%@page import="org.apache.solr.client.solrj.response.SpellCheckResponse.Suggestion" %> 
<%@page import="org.apache.solr.common.SolrDocument" %> 
<%@page import="org.apache.solr.common.SolrDocumentList" %> 

<% 
    String zkHost = "host:2181"; 

    CloudSolrServer server = new CloudSolrServer(zkHost); 

    SolrQuery params = new SolrQuery(); 
    String q = "some query"; 

    params.set("collection", new String[] { "my_collection" }); 
    params.set("q", new String[] { "text_en:" + q }); 
    params.set("fl", new String[] { "*,score" }); 
    params.set("start", new String[] { "0" }); 
    params.set("rows", new String[] { "10" }); 
    params.setHighlightSimplePre("<em>"); 
    params.setHighlightSimplePost("</em>"); 
    params.addHighlightField("name"); 
    params.setHighlight(true); 

    params.setSortField("score", SolrQuery.ORDER.desc); 
    params.set("timeAllowed", new String[] { "30000" }); 
    params.set("wt", new String[] { "json" }); 

    QueryResponse response2 = null; 
    try { 
     response2 = server.query(params); 
    } catch (SolrServerException e) { 
     out.println(e.getMessage()); 
     e.printStackTrace(response.getWriter()); 
     e.printStackTrace(); 
    } catch (Exception e) { 
     out.println(e.getMessage()); 
     e.printStackTrace(response.getWriter()); 
     e.printStackTrace(); 
    } finally { 
     server.shutdown(); 
    } 
%> 

我在執行JSP頁面時遇到錯誤。

org.apache.solr.client.solrj.SolrServerException: Error executing query 
     at org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:98) 
     at org.apache.solr.client.solrj.SolrServer.query(SolrServer.java:301) 
     at jsp_servlet._solr.__solrtest._jspService(__solrtest.java:102) 
     at weblogic.servlet.jsp.JspBase.service(JspBase.java:34) 
     at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227) 
     at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125) 
     at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301) 
     at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26) 
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60) 
     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) 
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) 
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60) 
     at 
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60) 
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3748) 
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3714) 
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) 
     at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120) 
     at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2283) 
     at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2182) 
     at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1491) 
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256) 
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:221) 
Caused by: java.lang.RuntimeException: java.util.concurrent.TimeoutException: Could not connect to ZooKeeper host:2181 within 10000 ms 
     at org.apache.solr.common.cloud.SolrZkClient.<init>(SolrZkClient.java:142) 
     at org.apache.solr.common.cloud.SolrZkClient.<init>(SolrZkClient.java:88) 
     at org.apache.solr.common.cloud.ZkStateReader.<init>(ZkStateReader.java:150) 
     at org.apache.solr.client.solrj.impl.CloudSolrServer.connect(CloudSolrServer.java:240) 
     at org.apache.solr.client.solrj.impl.CloudSolrServer.request(CloudSolrServer.java:501) 
     at org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:90) 
     ... 22 more 
Caused by: java.util.concurrent.TimeoutException: Could not connect to ZooKeeper host:2181 within 10000 ms 
     at org.apache.solr.common.cloud.ConnectionManager.waitForConnected(ConnectionManager.java:169) 
     at org.apache.solr.common.cloud.SolrZkClient.<init>(SolrZkClient.java:134) 
     ... 27 more 

我試圖增加超時，但沒有幫助。另外我知道它不是超時的問題，因爲從獨立的java程序執行時，相同的代碼工作正常。但是，它在Weblogic中運行的Web應用程序中執行時會失敗。我試圖將其轉換爲一個servlet並得到相同的錯誤。

Answer 1

這是Zookeeper 3.4.5中的一個錯誤。 https://issues.apache.org/jira/browse/ZOOKEEPER-1696

我在Weblogic中部署了zookeeper 3.4.6並使其工作。