diff --git a/src/libs/languageserverprotocol/basemessage.cpp b/src/libs/languageserverprotocol/basemessage.cpp
index 1ee17e3eee3..950976549e3 100644
--- a/src/libs/languageserverprotocol/basemessage.cpp
+++ b/src/libs/languageserverprotocol/basemessage.cpp
@@ -37,6 +37,8 @@
 
 namespace LanguageServerProtocol {
 
+Q_LOGGING_CATEGORY(parseLog, "qtc.languageserverprotocol.parse", QtWarningMsg)
+
 BaseMessage::BaseMessage()
     : mimeType(JsonRpcMessageHandler::jsonRpcMimeType())
 { }
@@ -68,8 +70,7 @@ bool BaseMessage::operator==(const BaseMessage &other) const
     return true;
 }
 
-static QPair<QByteArray, QByteArray> splitHeaderFieldLine(
-        const QByteArray &headerFieldLine, QString &parseError)
+static QPair<QByteArray, QByteArray> splitHeaderFieldLine(const QByteArray &headerFieldLine)
 {
     static const int fieldSeparatorLength = int(std::strlen(headerFieldSeparator));
     int assignmentIndex = headerFieldLine.indexOf(headerFieldSeparator);
@@ -77,8 +78,7 @@ static QPair<QByteArray, QByteArray> splitHeaderFieldLine(
         return {headerFieldLine.mid(0, assignmentIndex),
                     headerFieldLine.mid(assignmentIndex + fieldSeparatorLength)};
     }
-    parseError = BaseMessage::tr("Unexpected header line \"%1\".")
-            .arg(QLatin1String(headerFieldLine));
+    qCWarning(parseLog) << "Unexpected header line:" << QLatin1String(headerFieldLine);
     return {};
 }
 
@@ -134,8 +134,7 @@ void BaseMessage::parse(QBuffer *data, QString &parseError, BaseMessage &message
                 message.content = data->read(message.contentLength);
             return;
         }
-        const QPair<QByteArray, QByteArray> nameAndValue =
-                splitHeaderFieldLine(headerFieldLine, parseError);
+        const QPair<QByteArray, QByteArray> nameAndValue = splitHeaderFieldLine(headerFieldLine);
         const QByteArray &headerFieldName = nameAndValue.first.trimmed();
         const QByteArray &headerFieldValue = nameAndValue.second.trimmed();
 
@@ -146,9 +145,8 @@ void BaseMessage::parse(QBuffer *data, QString &parseError, BaseMessage &message
         } else if (headerFieldName == contentTypeFieldName) {
             parseContentType(message, headerFieldValue, parseError);
         } else {
-            parseError = tr("Unexpected header field \"%1\" in \"%2\".")
-                    .arg(QLatin1String(headerFieldName),
-                         QLatin1String(headerFieldLine));
+            qCWarning(parseLog) << "Unexpected header field" << QLatin1String(headerFieldName)
+                                  << "in" << QLatin1String(headerFieldLine);
         }
     }
 
diff --git a/src/libs/languageserverprotocol/basemessage.h b/src/libs/languageserverprotocol/basemessage.h
index ba8238291ad..b2835aa7d74 100644
--- a/src/libs/languageserverprotocol/basemessage.h
+++ b/src/libs/languageserverprotocol/basemessage.h
@@ -31,6 +31,7 @@
 
 #include <QByteArray>
 #include <QCoreApplication>
+#include <QLoggingCategory>
 
 QT_BEGIN_NAMESPACE
 class QBuffer;
@@ -39,6 +40,8 @@ QT_END_NAMESPACE
 
 namespace LanguageServerProtocol {
 
+LANGUAGESERVERPROTOCOL_EXPORT Q_DECLARE_LOGGING_CATEGORY(parseLog)
+
 class LANGUAGESERVERPROTOCOL_EXPORT BaseMessage
 {
     Q_DECLARE_TR_FUNCTIONS(BaseMessage)
diff --git a/src/plugins/languageclient/languageclientinterface.cpp b/src/plugins/languageclient/languageclientinterface.cpp
index 389ed0517f3..91d2562e672 100644
--- a/src/plugins/languageclient/languageclientinterface.cpp
+++ b/src/plugins/languageclient/languageclientinterface.cpp
@@ -35,7 +35,6 @@
 using namespace LanguageServerProtocol;
 
 static Q_LOGGING_CATEGORY(LOGLSPCLIENTV, "qtc.languageclient.messages", QtWarningMsg);
-static Q_LOGGING_CATEGORY(LOGLSPCLIENTPARSE, "qtc.languageclient.parse", QtWarningMsg);
 
 namespace LanguageClient {
 
@@ -64,8 +63,8 @@ void BaseClientInterface::resetBuffer()
 void BaseClientInterface::parseData(const QByteArray &data)
 {
     const qint64 preWritePosition = m_buffer.pos();
-    qCDebug(LOGLSPCLIENTPARSE) << "parse buffer pos: " << preWritePosition;
-    qCDebug(LOGLSPCLIENTPARSE) << "  data: " << data;
+    qCDebug(parseLog) << "parse buffer pos: " << preWritePosition;
+    qCDebug(parseLog) << "  data: " << data;
     if (!m_buffer.atEnd())
         m_buffer.seek(preWritePosition + m_buffer.bytesAvailable());
     m_buffer.write(data);
@@ -73,9 +72,9 @@ void BaseClientInterface::parseData(const QByteArray &data)
     while (!m_buffer.atEnd()) {
         QString parseError;
         BaseMessage::parse(&m_buffer, parseError, m_currentMessage);
-        qCDebug(LOGLSPCLIENTPARSE) << "  complete: " << m_currentMessage.isComplete();
-        qCDebug(LOGLSPCLIENTPARSE) << "  length: " << m_currentMessage.contentLength;
-        qCDebug(LOGLSPCLIENTPARSE) << "  content: " << m_currentMessage.content;
+        qCDebug(parseLog) << "  complete: " << m_currentMessage.isComplete();
+        qCDebug(parseLog) << "  length: " << m_currentMessage.contentLength;
+        qCDebug(parseLog) << "  content: " << m_currentMessage.content;
         if (!parseError.isEmpty())
             emit error(parseError);
         if (!m_currentMessage.isComplete())