revise error message in ipc_response

src/tateyama/endpoint/ipc/bootstrap/server_wires_impl.h

@@ -306,8 +306,10 @@ class server_wire_container_impl : public server_wire_container
                     new resultset_wire_container_impl{shm_resultset_wires_->acquire(), *this, datachannel_buffer_size_}, resultset_wire_deleter_impl};
             } catch(const boost::interprocess::interprocess_exception& ex) {
                 throw std::runtime_error(ex.what());
-            } catch (std::exception &ex) {
-                LOG_LP(ERROR) << "running out of boost managed shared memory";
+            } catch(const std::runtime_error& ex) {
+                throw ex;
+            } catch (const std::exception &ex) {
+                LOG_LP(ERROR) << "unknown error in resultset_wires_container_impl::acquire: " << ex.what();
                 throw ex;
             }
         }

src/tateyama/endpoint/ipc/ipc_response.cpp

@@ -157,10 +157,15 @@ tateyama::status ipc_data_channel::acquire(std::shared_ptr<tateyama::api::server
             return tateyama::status::ok;
         }
         throw std::runtime_error("error in create ipc_writer");
-    } catch (std::exception &ex) {
+    } catch(const std::runtime_error& ex) {
         wrt = nullptr;
 
-        LOG_LP(INFO) << "Running out of shared memory for result set transfers. Probably due to too many result sets being opened";
+        LOG_LP(INFO) << ex.what();
+        return tateyama::status::unknown;
+    } catch (const std::exception &ex) {
+        wrt = nullptr;
+
+        LOG_LP(ERROR) << "unknown error ipc_data_channel::acquire: " << ex.what();
         return tateyama::status::unknown;
     }
 }