diff --git a/tools/maven/suppressions.xml b/tools/maven/suppressions.xml
index 0839cb8a14b..8b8b6d5ab01 100644
--- a/tools/maven/suppressions.xml
+++ b/tools/maven/suppressions.xml
@@ -24,6 +24,11 @@
 <suppressions>
     <suppress files="DataTypes.java" checks="MethodNameCheck"/>
 
+    <!-- TODO: Refactor CoordinatorEventProcessor and split its tests by responsibility,
+         then remove these FileLength suppressions. Track: https://github.com/apache/fluss/issues/4312 -->
+    <suppress files="[\\/]CoordinatorEventProcessor\.java$" checks="FileLength"/>
+    <suppress files="[\\/]CoordinatorEventProcessorTest\.java$" checks="FileLength"/>
+
     <!-- target directory is not relevant for checkstyle -->
     <suppress
         files="[\\/]target[\\/]"