diff --git a/components/codecs/include/ftl/codecs/writer.hpp b/components/codecs/include/ftl/codecs/writer.hpp
index 044624ba837f17c83e4a22a16787ec86edd4ad67..94d82f1ecbfb697bdbad35acc5a4cf29dad22410 100644
--- a/components/codecs/include/ftl/codecs/writer.hpp
+++ b/components/codecs/include/ftl/codecs/writer.hpp
@@ -5,6 +5,7 @@
 #include <msgpack.hpp>
 //#include <Eigen/Eigen>
 
+#include <ftl/threads.hpp>
 #include <ftl/codecs/packet.hpp>
 
 namespace ftl {
@@ -24,6 +25,7 @@ class Writer {
 	msgpack::sbuffer buffer_;
 	int64_t timestart_;
 	bool active_;
+	MUTEX mutex_;
 };
 
 }
diff --git a/components/codecs/src/reader.cpp b/components/codecs/src/reader.cpp
index 97a74acd1a16c29e7d5c926382759aaf765b1818..ba68f26c9666da9a84ea86632caa1035bb6c5c88 100644
--- a/components/codecs/src/reader.cpp
+++ b/components/codecs/src/reader.cpp
@@ -37,6 +37,22 @@ bool Reader::begin() {
 	return true;
 }
 
+/*static void printMsgpack(msgpack::object &obj) {
+	switch (obj.type) {
+	case msgpack::type::NIL: return;
+	case msgpack::type::BOOLEAN: LOG(INFO) << "BOOL " << obj.as<bool>(); return;
+	case msgpack::type::POSITIVE_INTEGER:
+	case msgpack::type::NEGATIVE_INTEGER: LOG(INFO) << "INT " << obj.as<int>(); return;
+	case msgpack::type::FLOAT32: LOG(INFO) << "FLOAT " << obj.as<float>(); return;
+	case msgpack::type::FLOAT64: LOG(INFO) << "DOUBLE " << obj.as<double>(); return;
+	case msgpack::type::STR: LOG(INFO) << "STRING " << obj.as<std::string>(); return;
+	case msgpack::type::BIN: return;
+	case msgpack::type::EXT: return;
+	case msgpack::type::ARRAY: LOG(INFO) << "ARRAY: "; return;
+	case msgpack::type::MAP: LOG(INFO) << "MAP: "; return;
+	}
+}*/
+
 bool Reader::read(int64_t ts, const std::function<void(const ftl::codecs::StreamPacket &, ftl::codecs::Packet &)> &f) {
 	//UNIQUE_LOCK(mtx_, lk);
 	std::unique_lock<std::mutex> lk(mtx_, std::defer_lock);
@@ -75,10 +91,13 @@ bool Reader::read(int64_t ts, const std::function<void(const ftl::codecs::Stream
 
 		//std::tuple<StreamPacket,Packet> data;
 		msgpack::object obj = msg.get();
+
+		//printMsgpack(obj);
+
 		try {
 			obj.convert(data_.emplace_back());
 		} catch (std::exception &e) {
-			LOG(INFO) << "Corrupt message: " << buffer_.nonparsed_size();
+			LOG(INFO) << "Corrupt message: " << buffer_.nonparsed_size() << " - " << e.what();
 			//partial = true;
 			//continue;
 			return false;
diff --git a/components/codecs/src/writer.cpp b/components/codecs/src/writer.cpp
index d7582f11866b701796ab311016d2a01a5218595a..1e3841a8e05f840f808aaddf127833392212af05 100644
--- a/components/codecs/src/writer.cpp
+++ b/components/codecs/src/writer.cpp
@@ -41,7 +41,8 @@ bool Writer::write(const ftl::codecs::StreamPacket &s, const ftl::codecs::Packet
 	auto data = std::make_tuple(s2,p);
 	msgpack::sbuffer buffer;
 	msgpack::pack(buffer, data);
+
+	UNIQUE_LOCK(mutex_, lk);
 	(*stream_).write(buffer.data(), buffer.size());
-	//buffer_.clear();
 	return true;
 }