diff --git a/src/client/cluster_client.cpp b/src/client/cluster_client.cpp
index d9d12ab2..f8f2cacf 100644
--- a/src/client/cluster_client.cpp
+++ b/src/client/cluster_client.cpp
@@ -1077,7 +1077,7 @@ bool cluster_client_t::try_send(cluster_op_t *op, int i)
                 pool_cfg.scheme == POOL_SCHEME_REPLICATED ? 1 : pool_cfg.pg_size-pool_cfg.parity_chunks
             );
             uint64_t meta_rev = 0;
-            if (op->opcode != OSD_OP_READ_BITMAP && op->opcode != OSD_OP_READ_CHAIN_BITMAP && op->opcode != OSD_OP_DELETE)
+            if (op->opcode != OSD_OP_READ_BITMAP && op->opcode != OSD_OP_DELETE)
             {
                 auto ino_it = st_cli.inode_config.find(op->inode);
                 if (ino_it != st_cli.inode_config.end())
diff --git a/src/osd/osd_primary_chain.cpp b/src/osd/osd_primary_chain.cpp
index ac381775..ba6321bd 100644
--- a/src/osd/osd_primary_chain.cpp
+++ b/src/osd/osd_primary_chain.cpp
@@ -336,8 +336,8 @@ std::vector<osd_chain_read_t> osd_t::collect_chained_read_requests(osd_op_t *cur
     for (int chain_pos = 0; chain_pos < op_data->chain_size; chain_pos++)
     {
         uint8_t *part_bitmap = ((uint8_t*)op_data->snapshot_bitmaps) + chain_pos*stripe_count*clean_entry_bitmap_size;
-        int start = (cur_op->req.rw.offset - op_data->oid.stripe)/bs_bitmap_granularity;
-        int end = start + cur_op->req.rw.len/bs_bitmap_granularity;
+        int start = !cur_op->req.rw.len ? 0 : (cur_op->req.rw.offset - op_data->oid.stripe)/bs_bitmap_granularity;
+        int end = !cur_op->req.rw.len ? op_data->pg_data_size*clean_entry_bitmap_size : start + cur_op->req.rw.len/bs_bitmap_granularity;
         // Skip unneeded part in the beginning
         while (start < end && (
             ((global_bitmap[start>>3] >> (start&7)) & 1) ||