Исправлен StackOverflow

src/main/java/ru/serega6531/packmate/model/Pattern.java

@@ -2,12 +2,14 @@ package ru.serega6531.packmate.model;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import lombok.Data;
+import lombok.ToString;
 import org.hibernate.annotations.GenericGenerator;
 
 import javax.persistence.*;
 import java.util.List;
 
 @Data
+@ToString(exclude = "matchedStreams")
 @Entity
 @GenericGenerator(
         name = "pattern_generator",
@@ -32,7 +34,7 @@ public class Pattern {
 
     private boolean isRegex;
 
-    @ManyToMany(mappedBy = "foundPatterns", cascade = CascadeType.ALL)
+    @ManyToMany(mappedBy = "foundPatterns", cascade = CascadeType.ALL, fetch = FetchType.LAZY)
     @JsonIgnore
     private List<Stream> matchedStreams;