Hi Everyone,
I am reaching out to ask for a second pair of eyes on this custom servlet
that I'm migrating from DSpace JSPUI x5.9 to x6.3. The servlet builds and
deploys without any issues but does not return a response from the solr
query when the servlet URL is requested. The goal of this servlet is to
return json data about deposits that have been recently viewed, the
original solr query is in line 76. The logs don't indicate a solr response
is returned at all, the last log is at line 89 and doesn't go past line 93
where the response value is assigned. If anyone can spot anything I've
missed or have some feedback about another approach, that would be greatly
appreciated. Thank you for reading.
Best Regards,
Rachel
Servlet
60 public class SolrStatsServlet extends DSpaceServlet
61 {
62 /** log4j category */
63 private static Logger log =
Logger.getLogger(SolrStatsServlet.class);
64 private HandleService handleService;
65 private ItemService itemService;
66 // private static final String RESOURCE_TYPE_FIELD =
"search.resourcetype";
67 private HttpSolrServer solr = null;
68
69 protected void doDSGet(Context context, HttpServletRequest request,
70 HttpServletResponse response) throws ServletException,
IOException,
71 SQLException, AuthorizeException {
72
73 handleService =
HandleServiceFactory.getInstance().getHandleService();
74 itemService =
ContentServiceFactory.getInstance().getItemService();
75
76 // Original solr query -
'select?indent=on&start=0&rows=10&q=type:2&fq=-isBot:true&fq=statistics_type:view&sort=time+desc'
77 QueryResponse solrResponse = null;
78
79 try {
80
81 log.info("Debug 1");
82 SolrQuery solrQuery = new SolrQuery().setQuery("type:2");
83
84 solrQuery.addFilterQuery("-isBot:true");
85 solrQuery.addFilterQuery("statistics_type:view");
86 solrQuery.addSortField("time", SolrQuery.ORDER.desc); //
sort by time
87 solrQuery.setRows(10);// 10 results max
88 log.info("Debug 2");
89 log.info(solrQuery);
90
//q=type%3A0&fq=-isBot%3Atrue&fq=statistics_type%3Aview&sort=time+desc&rows=10
91
92 // solrResponse = solr.query(solrQuery);
93 solrResponse = solr.query(solrQuery,
SolrRequest.METHOD.GET);
94 log.info("Debug 3");
95
96 } catch (SolrServerException e) {
97 log.info("Debug 4 - ERROR");
98 log.error("Solr failed to return docs for home page map: "
+ e.getMessage());
99 return;
100 }
101
102 log.info("Debug 5");
103 SolrDocumentList docList = solrResponse.getResults();
104 log.info("Debug 6");
136 }
137
138 protected void doDSPost(Context context, HttpServletRequest request,
139 HttpServletResponse response) throws ServletException,
IOException,
140 SQLException, AuthorizeException
141 {
142 // Treat as a GET
143 doDSGet(context, request, response);
144 }
Dspace.log file
2020-06-08 11:55:56,314 INFO org.dspace.app.webui.servlet.SolrStatsServlet
@ Debug 1
2020-06-08 11:55:56,315 INFO org.dspace.app.webui.servlet.SolrStatsServlet
@ Debug 2
2020-06-08 11:55:56,315 INFO org.dspace.app.webui.servlet.SolrStatsServlet
@
q=type%3A2&fq=-isBot%3Atrue&fq=statistics_type%3Aview&sort=time+desc&rows=10
2020-06-08 11:55:56,315 WARN org.dspace.app.webui.servlet.DSpaceServlet @
anonymous:session_id=09DCF4D40B91772CB2F26D8F645148E5:ip_addr=142.150.192.3:general_jspui_error:java.lang.NullPointerException
java.lang.NullPointerException
at
org.dspace.app.webui.servlet.SolrStatsServlet.doDSGet(SolrStatsServlet.java:93)
at
org.dspace.app.webui.servlet.DSpaceServlet.processRequest(DSpaceServlet.java:126)
at org.dspace.app.webui.servlet.DSpaceServlet.doGet(DSpaceServlet.java:73)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.dspace.utils.servlet.DSpaceWebappServletFilter.doFilter(DSpaceWebappServletFilter.java:78)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:190)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
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