diff --git a/src/osd/ECBackend.cc b/src/osd/ECBackend.cc
index b69112c2b5c..45af62c2152 100644
--- a/src/osd/ECBackend.cc
+++ b/src/osd/ECBackend.cc
@@ -2200,6 +2200,10 @@ void ECBackend::objects_read_async(
 	  auto range = got.second.get_containing_range(offset, length);
 	  ceph_assert(range.first != range.second);
 	  ceph_assert(range.first.get_off() <= offset);
+          ldpp_dout(dpp, 30) << "offset: " << offset << dendl;
+          ldpp_dout(dpp, 30) << "range offset: " << range.first.get_off() << dendl;
+          ldpp_dout(dpp, 30) << "length: " << length << dendl;
+          ldpp_dout(dpp, 30) << "range length: " << range.first.get_len()  << dendl;
 	  ceph_assert(
 	    (offset + length) <=
 	    (range.first.get_off() + range.first.get_len()));
diff --git a/src/osd/PrimaryLogPG.cc b/src/osd/PrimaryLogPG.cc
index 0c9ecbe8075..c0ccd802e12 100644
--- a/src/osd/PrimaryLogPG.cc
+++ b/src/osd/PrimaryLogPG.cc
@@ -5435,9 +5435,15 @@ int PrimaryLogPG::do_read(OpContext *ctx, OSDOp& osd_op) {
   uint64_t size = oi.size;
   bool trimmed_read = false;
 
+  dout(30) << __func__ << " oi.size: " << oi.size << dendl;
+  dout(30) << __func__ << " oi.truncate_seq: " << oi.truncate_seq << dendl;
+  dout(30) << __func__ << " op.extent.truncate_seq: " << op.extent.truncate_seq << dendl;
+  dout(30) << __func__ << " op.extent.truncate_size: " << op.extent.truncate_size << dendl;
+
   // are we beyond truncate_size?
   if ( (seq < op.extent.truncate_seq) &&
-       (op.extent.offset + op.extent.length > op.extent.truncate_size) )
+       (op.extent.offset + op.extent.length > op.extent.truncate_size) &&
+       (size > op.extent.truncate_size) )
     size = op.extent.truncate_size;
 
   if (op.extent.length == 0) //length is zero mean read the whole object
@@ -5451,6 +5457,8 @@ int PrimaryLogPG::do_read(OpContext *ctx, OSDOp& osd_op) {
     trimmed_read = true;
   }
 
+  dout(30) << __func__ << "op.extent.length is now " << op.extent.length << dendl;
+
   // read into a buffer
   int result = 0;
   if (trimmed_read && op.extent.length == 0) {