diff --git a/objectstore/ArchiveQueue.cpp b/objectstore/ArchiveQueue.cpp
index e0ae0c3f8b782ea3a2c46a191177c8aa6604d2c7..a44e8241c5c16dde04a34bf93e7120ac10713227 100644
--- a/objectstore/ArchiveQueue.cpp
+++ b/objectstore/ArchiveQueue.cpp
@@ -564,9 +564,9 @@ auto ArchiveQueue::getCandidateList(uint64_t maxBytes, uint64_t maxFiles, std::s
 auto ArchiveQueue::getCandidateSummary() -> CandidateJobList {
   checkPayloadReadable();
   CandidateJobList ret;
-  for(auto & rqsp: m_payload.archivequeueshards()) {
-    ret.candidateBytes += rqsp.shardbytescount();
-    ret.candidateFiles += rqsp.shardjobscount();
+  for(auto & aqsp: m_payload.archivequeueshards()) {
+    ret.candidateBytes += aqsp.shardbytescount();
+    ret.candidateFiles += aqsp.shardjobscount();
   }
   return ret;
 }
diff --git a/scheduler/OStoreDB/OStoreDB.cpp b/scheduler/OStoreDB/OStoreDB.cpp
index b2fb41a7180ba7e781f5f96eafcf3244ead56393..2015c684f81d9e9eaca20f93d9cf1c5c1e42b073 100644
--- a/scheduler/OStoreDB/OStoreDB.cpp
+++ b/scheduler/OStoreDB/OStoreDB.cpp
@@ -704,6 +704,15 @@ SchedulerDatabase::JobsFailedSummary OStoreDB::getArchiveJobsFailedSummary(log::
   auto queueList = re.dumpArchiveQueues(QueueType::FailedJobs);
   for(auto &aj : queueList) {
     ArchiveQueue aq(aj.address, m_objectStore);
+    try {
+      aq.fetchNoLock();
+    } catch (cta::exception::Exception &ex) {
+      log::ScopedParamContainer params (logContext);
+      params.add("queueObject", aj.address)
+            .add("exceptionMessage", ex.getMessageValue());
+      logContext.log(log::WARNING, "In OStoreDB::getArchiveJobsFailedSummary(): failed to lock/fetch an archive queue.");
+      continue;
+    }
     auto summary = aq.getCandidateSummary();
     ret.totalFiles += summary.candidateFiles;
     ret.totalBytes += summary.candidateBytes;
@@ -1144,6 +1153,15 @@ SchedulerDatabase::JobsFailedSummary OStoreDB::getRetrieveJobsFailedSummary(log:
   auto queueList = re.dumpRetrieveQueues(QueueType::FailedJobs);
   for(auto &rj : queueList) {
     RetrieveQueue rq(rj.address, m_objectStore);
+    try {
+      rq.fetchNoLock();
+    } catch (cta::exception::Exception &ex) {
+      log::ScopedParamContainer params (logContext);
+      params.add("queueObject", rj.address)
+            .add("exceptionMessage", ex.getMessageValue());
+      logContext.log(log::WARNING, "In OStoreDB::getRetrieveJobsFailedSummary(): failed to lock/fetch a retrieve queue.");
+      continue;
+    }
     auto summary = rq.getCandidateSummary();
     ret.totalFiles += summary.candidateFiles;
     ret.totalBytes += summary.candidateBytes;