return empty string upon failed client lookup

conanfile.py

@@ -9,7 +9,7 @@
 
 class HomestoreConan(ConanFile):
     name = "homestore"
-    version = "6.4.56"
+    version = "6.4.57"
 
     homepage = "https://github.com/eBay/Homestore"
     description = "HomeStore Storage Engine"

src/lib/replication/repl_dev/raft_repl_dev.cpp

@@ -1092,7 +1092,7 @@ void RaftReplDev::flush_durable_commit_lsn() {
 }
 
 ///////////////////////////////////  Private metohds ////////////////////////////////////
-void RaftReplDev::cp_flush(CP*) {
+void RaftReplDev::cp_flush(CP* cp) {
     auto const lsn = m_commit_upto_lsn.load();
     auto const clsn = m_compact_lsn.load();
 
@@ -1108,6 +1108,8 @@ void RaftReplDev::cp_flush(CP*) {
     m_rd_sb->last_applied_dsn = m_next_dsn.load();
     m_rd_sb.write();
     m_last_flushed_commit_lsn = lsn;
+    RD_LOGD("cp flush in raft repl dev, lsn={}, clsn={}, next_dsn={}, cp string:{}", lsn, clsn, m_next_dsn.load(),
+            cp->to_string());
 }
 
 void RaftReplDev::cp_cleanup(CP*) {}

src/lib/replication/service/raft_repl_service.cpp

@@ -185,6 +185,7 @@ RaftReplDev* RaftReplService::raft_group_config_found(sisl::byte_view const& buf
 
 std::string RaftReplService::lookup_peer(nuraft_mesg::peer_id_t const& peer) {
     auto const p = m_repl_app->lookup_peer(peer);
+    if (p.first.empty()) { return {}; }
     return p.first + ":" + std::to_string(p.second);
 }