- Change the repository for the Impala JDBC Driver, as the previous one had networking issues.

- Optimize the "findAssignmentsQuery".

build.gradle

@@ -12,7 +12,7 @@ repositories {
     mavenCentral()
     maven {
         name "icm"
-        url "http://maven.icm.edu.pl/artifactory/repo/"
+        url "http://esperos.di.uoa.gr/repo"
         allowInsecureProtocol = true
     }
     maven {

src/main/java/eu/openaire/urls_controller/controllers/UrlController.java

@@ -68,7 +68,7 @@ public class UrlController {
                 "  select a.id, a.original_url from " + ImpalaConnector.databaseName + ".assignment a\n" +
                 "  union all\n" +
                 "  select pl.id, pl.original_url from " + ImpalaConnector.databaseName + ".payload pl) as existing on existing.id=p.id and existing.original_url=pu.url\n" +
-                "where d.allow_harvest=true and existing.id is null and coalesce(attempts.counts, 0) <= " + ControllerConstants.MAX_ATTEMPTS_PER_RECORD + " and not exists (select 1 from " + ImpalaConnector.databaseName + ".attempt a where a.id=p.id and a.error_class = 'noRetry')\n" +
+                "where d.allow_harvest=true and existing.id is null and coalesce(attempts.counts, 0) <= " + ControllerConstants.MAX_ATTEMPTS_PER_RECORD + " and not exists (select 1 from " + ImpalaConnector.databaseName + ".attempt a where a.id=p.id and a.error_class = 'noRetry' limit 1)\n" +
                 "limit " + (assignmentsLimit * 10) + ") as non_distinct_results\n" +
                 "order by coalesce(attempt_count, 0), reverse(pubid), url\n" +
                 "limit " + assignmentsLimit + ") as findAssignmentsQuery";