diff --git a/arangod/Agency/Constituent.cpp b/arangod/Agency/Constituent.cpp
index b10f7dba65..e835273254 100644
--- a/arangod/Agency/Constituent.cpp
+++ b/arangod/Agency/Constituent.cpp
@@ -144,7 +144,7 @@ void Constituent::termNoLock(term_t t) {
         result = trx.insert("election", body.slice(), options);
       } catch (std::exception const& e) {
         LOG_TOPIC(FATAL, Logger::AGENCY)
-          << "Failed to persist RAFT election ballot. Bailing out."
+          << "Failed to persist RAFT election ballot: " << e.what() << ". Bailing out."
           << __FILE__ << ":" << __LINE__;
         FATAL_ERROR_EXIT();
       }
diff --git a/arangod/Agency/State.cpp b/arangod/Agency/State.cpp
index 98cf9e7287..3709277ae6 100644
--- a/arangod/Agency/State.cpp
+++ b/arangod/Agency/State.cpp
@@ -204,7 +204,7 @@ index_t State::logNonBlocking(
 
   try {
     _log.push_back(log_t(idx, term, buf, clientId));  // log to RAM or die
-  } catch (std::bad_alloc const& e) {                 
+  } catch (std::bad_alloc const&) {
     if (leading) {
       LOG_TOPIC(FATAL, Logger::AGENCY)
         << "RAFT leader fails to allocate volatile log entries!"
diff --git a/arangod/RocksDBEngine/RocksDBEdgeIndex.cpp b/arangod/RocksDBEngine/RocksDBEdgeIndex.cpp
index a868f9769b..e0dad29804 100644
--- a/arangod/RocksDBEngine/RocksDBEdgeIndex.cpp
+++ b/arangod/RocksDBEngine/RocksDBEdgeIndex.cpp
@@ -255,10 +255,11 @@ bool RocksDBEdgeIndexIterator::nextExtra(ExtraCallback const& cb,
             TRI_ASSERT(_builderIterator.value().isNumber());
             RocksDBToken tkn{
                 _builderIterator.value().getNumericValue<uint64_t>()};
+            
             _builderIterator.next();
+            
             TRI_ASSERT(_builderIterator.valid());
             TRI_ASSERT(_builderIterator.value().isString());
-
             cb(tkn, _builderIterator.value());
 
             _builderIterator.next();
@@ -676,9 +677,11 @@ void RocksDBEdgeIndex::warmup(arangodb::transaction::Methods* trx) {
           RocksDBToken token(revisionId);
           if (rocksColl->readDocument(trx, token, mmdr)) {
             builder.add(VPackValue(token.revisionId()));
+            
             VPackSlice doc(mmdr.vpack());
-            TRI_ASSERT(doc.isObject());
-            builder.add(doc);
+            VPackSlice toFrom = _isFromIndex ? transaction::helpers::extractToFromDocument(doc) : transaction::helpers::extractFromFromDocument(doc);
+            TRI_ASSERT(toFrom.isString());
+            builder.add(toFrom);
 #ifdef USE_MAINTAINER_MODE
           } else {
             // Data Inconsistency.
diff --git a/arangod/RocksDBEngine/RocksDBGeoIndexImpl.cpp b/arangod/RocksDBEngine/RocksDBGeoIndexImpl.cpp
index a88cf54232..68c2367b2b 100644
--- a/arangod/RocksDBEngine/RocksDBGeoIndexImpl.cpp
+++ b/arangod/RocksDBEngine/RocksDBGeoIndexImpl.cpp
@@ -399,9 +399,6 @@ void SlotWrite(GeoIx * gix,int slot, GeoCoordinate * gc)
   char data[sizeof (GeoCoordinate)];
   toPersistent(*gc, &data[0]);
   RocksWrite(gix, key, rocksdb::Slice(&data[0], sizeof(GeoCoordinate)));
-
-  GeoCoordinate test;
-  fromPersistent(&data[0],test);
 }
 
 void PotRead(GeoIx * gix, int pot, GeoPot * gp)
diff --git a/lib/Basics/tri-zip.cpp b/lib/Basics/tri-zip.cpp
index 4390ed0138..ebce4d47bb 100644
--- a/lib/Basics/tri-zip.cpp
+++ b/lib/Basics/tri-zip.cpp
@@ -387,6 +387,7 @@ int TRI_Adler32(char const* filename, uint32_t& checksum) {
   struct TRI_STAT statbuf;
   int res = TRI_FSTAT(fd, &statbuf);
   if (res < 0) {
+    TRI_ERRORBUF;
     TRI_SYSTEM_ERROR();
     return TRI_set_errno(TRI_ERROR_SYS_ERROR);
   }
diff --git a/lib/SimpleHttpClient/Communicator.cpp b/lib/SimpleHttpClient/Communicator.cpp
index e2f1e04aa0..4a49d6fe65 100644
--- a/lib/SimpleHttpClient/Communicator.cpp
+++ b/lib/SimpleHttpClient/Communicator.cpp
@@ -175,6 +175,7 @@ Ticket Communicator::addRequest(Destination destination,
         NewRequest{destination, std::move(request), callbacks, options, id});
   }
 
+  LOG_TOPIC(TRACE, Logger::COMMUNICATION) << "request to " << destination.url() << " has been put onto queue";
   // mop: just send \0 terminated empty string to wake up worker thread
 #ifdef _WIN32
   ssize_t numBytes = send(_socks[1], "", 1, 0);