java.lang.NoClassDefFoundError: com/atlassian/util/profiling/UtilTimerStack

Getting the below error
Uncaught exception 4ff4fb46-f3a4-412a-8ba8-898548c97e76 thrown by REST service: com/atlassian/util/profiling/UtilTimerStack
java.lang.NoClassDefFoundError: com/atlassian/util/profiling/UtilTimerStack
at com.thed.zephyr.je.zql.core.LuceneSearchProviderImpl.search(LuceneSearchProviderImpl.java:130)
at com.thed.zephyr.je.zql.core.LuceneSearchProviderImpl.search(LuceneSearchProviderImpl.java:90)
at com.thed.zephyr.je.zql.core.ZSearchServiceImpl.search(ZSearchServiceImpl.java:74)
at com.thed.zephyr.je.helper.ScheduleSearchResourceHelper.performZQLSearch(ScheduleSearchResourceHelper.java:1971)
at com.thed.zephyr.je.rest.ScheduleSearchResource.executeSearch(ScheduleSearchResource.java:178)

Below is the code snippet

public SearchResult search(final Query query, final ApplicationUser searcher,final org.apache.lucene.search.Query andQuery,
    		final boolean overrideSecurity,final Integer startIndex,boolean maxAllowedResult,Integer maxRecords) throws Exception {
        final ZFJManagedIndexSearcher scheduleSearcher = getScheduleSearcher();
        UtilTimerStack.push("Lucene Query");
    	Integer maxResultHit = Integer.valueOf(JiraUtil.getSimpleDBProperty(ConfigurationConstants.ZEPHYR_ZQL_RESULT_MAX_ON_PAGE, "20").toString());
        String defaultMax = "10000";

I guess UtilTimerStack is deprecated now, can any onplease help me with alternate of this.
It will be of great help.
Thank you!

Can anyone please help me with this. It will be really of great help