Bulk scale test failed with NPE jobdetails is null

[chandrams]

Describe the bug

Invoking bulk service with thanos datasource with labels failed with:

java.lang.NullPointerException: Cannot invoke "com.autotune.analyzer.serviceObjects.BulkJobStatus.getStatus()" because "jobDetails" is null
        at com.autotune.analyzer.services.BulkService.doGet(BulkService.java:85)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:503)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:590)
        at org.eclipse.jetty.ee8.servlet.ServletHolder.handle(ServletHolder.java:640)
        at org.eclipse.jetty.ee8.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1374)
        at org.eclipse.jetty.ee8.servlets.CrossOriginFilter.handle(CrossOriginFilter.java:302)
        at org.eclipse.jetty.ee8.servlets.CrossOriginFilter.doFilter(CrossOriginFilter.java:270)
        at org.eclipse.jetty.ee8.servlet.FilterHolder.doFilter(FilterHolder.java:171)
        at org.eclipse.jetty.ee8.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1348)
        at org.eclipse.jetty.ee8.servlet.ServletHandler.doHandle(ServletHandler.java:454)
        at org.eclipse.jetty.ee8.nested.ScopedHandler.nextHandle(ScopedHandler.java:181)
        at org.eclipse.jetty.ee8.nested.ContextHandler.doHandle(ContextHandler.java:878)
        at org.eclipse.jetty.ee8.nested.ScopedHandler.nextScope(ScopedHandler.java:152)
        at org.eclipse.jetty.ee8.servlet.ServletHandler.doScope(ServletHandler.java:423)
        at org.eclipse.jetty.ee8.nested.ScopedHandler.nextScope(ScopedHandler.java:150)
        at org.eclipse.jetty.ee8.nested.ContextHandler.doScope(ContextHandler.java:823)
        at org.eclipse.jetty.ee8.nested.ScopedHandler.handle(ScopedHandler.java:117)
        at org.eclipse.jetty.ee8.nested.ContextHandler.handle(ContextHandler.java:1421)
        at org.eclipse.jetty.ee8.nested.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1294)
        at org.eclipse.jetty.ee8.nested.HttpChannel.dispatch(HttpChannel.java:624)
        at org.eclipse.jetty.ee8.nested.HttpChannel.handle(HttpChannel.java:456)
        at org.eclipse.jetty.ee8.nested.ContextHandler$CoreContextHandler$CoreToNestedHandler.handle(ContextHandler.java:2365)
        at org.eclipse.jetty.server.handler.ContextHandler.handle(ContextHandler.java:1060)
        at org.eclipse.jetty.server.Server.handle(Server.java:181)
        at org.eclipse.jetty.server.internal.HttpChannelState$HandlerInvoker.run(HttpChannelState.java:648)
        at org.eclipse.jetty.server.internal.HttpConnection.onFillable(HttpConnection.java:403)

How to reproduce it

• Get the bulk scale test from this PR - Included kruize local scalability test using bulk API #1396
• Connect to the OCP cluster
• Execute the below cmd
  ./bulk_scale_test.sh -i quay.io/kruize/autotune_operator:0.2 -w 10 -o 10 -c 5 -r /tmp/results

Expected behavior
NPE should not be thrown

Environment:

• Kubernetes Cluster openshift