diff --git a/json/jsonSchema/src/com/jetbrains/jsonSchema/JsonSchemaConfigurable.java b/json/jsonSchema/src/com/jetbrains/jsonSchema/JsonSchemaConfigurable.java
index 6d354b66d121..4c005900c3f0 100644
--- a/json/jsonSchema/src/com/jetbrains/jsonSchema/JsonSchemaConfigurable.java
+++ b/json/jsonSchema/src/com/jetbrains/jsonSchema/JsonSchemaConfigurable.java
@@ -7,6 +7,7 @@ import com.intellij.openapi.util.Comparing;
 import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.util.CollectConsumer;
 import com.jetbrains.jsonSchema.impl.JsonSchemaReader;
 import org.jetbrains.annotations.Nls;
 import org.jetbrains.annotations.NotNull;
@@ -14,6 +15,7 @@ import org.jetbrains.annotations.Nullable;
 
 import javax.swing.*;
 import java.io.File;
+import java.io.IOException;
 
 /**
  * @author Irina.Chernushina on 2/2/2016.
@@ -97,8 +99,18 @@ public class JsonSchemaConfigurable extends NamedConfigurable<JsonSchemaMappings
     if (StringUtil.isEmptyOrSpaces(myDisplayName)) throw new ConfigurationException("Schema name is empty");
     if (StringUtil.isEmptyOrSpaces(myView.getSchemaSubPath())) throw new ConfigurationException("Schema path is empty");
     if (!Comparing.equal(myView.getSchemaSubPath(), mySchema.getRelativePathToSchema())) {
-      if (!JsonSchemaReader.isJsonSchema(new File(myProject.getBasePath(), myView.getSchemaSubPath()).getPath())) {
-        throw new ConfigurationException("Can not read JSON schema from file");
+      final CollectConsumer<String> collectConsumer = new CollectConsumer<>();
+      final File file = new File(myProject.getBasePath(), myView.getSchemaSubPath());
+      try {
+        if (!JsonSchemaReader.isJsonSchema(FileUtil.loadFile(file), collectConsumer)) {
+          final String message;
+          if (collectConsumer.getResult().isEmpty()) message = "Can not read JSON schema from file (Unknown reason)";
+          else message = "Can not read JSON schema from file: " + StringUtil.join(collectConsumer.getResult(), "; ");
+          throw new ConfigurationException(message);
+        }
+      }
+      catch (IOException e) {
+        throw new ConfigurationException("Can not read JSON schema from file: " + e.getMessage());
       }
     }
   }
diff --git a/json/jsonSchema/src/com/jetbrains/jsonSchema/JsonSchemaMappingsConfigurable.java b/json/jsonSchema/src/com/jetbrains/jsonSchema/JsonSchemaMappingsConfigurable.java
index 43d3f6ba7039..ce86822a47b3 100644
--- a/json/jsonSchema/src/com/jetbrains/jsonSchema/JsonSchemaMappingsConfigurable.java
+++ b/json/jsonSchema/src/com/jetbrains/jsonSchema/JsonSchemaMappingsConfigurable.java
@@ -17,6 +17,7 @@ import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.vfs.VfsUtil;
 import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.util.CollectConsumer;
 import com.intellij.util.IconUtil;
 import com.jetbrains.jsonSchema.ide.JsonSchemaService;
 import com.jetbrains.jsonSchema.impl.JsonSchemaReader;
@@ -383,8 +384,12 @@ public class JsonSchemaMappingsConfigurable extends MasterDetailsComponent imple
         myError = "Problem during reading JSON schema from '" + myFile.getName() + "': " + e1.getMessage();
         return false;
       }
-      if (!JsonSchemaReader.isJsonSchema(myText)) {
-        myError = "JSON Schema not found in '" + myFile.getName() + "'";
+      final CollectConsumer<String> collectConsumer = new CollectConsumer<>();
+      if (!JsonSchemaReader.isJsonSchema(myText, collectConsumer)) {
+        myError = "JSON Schema not found or contain error in '" + myFile.getName() + "'";
+        if (!collectConsumer.getResult().isEmpty()) {
+          myError += ": " + StringUtil.join(collectConsumer.getResult(), "; ");
+        }
         return false;
       }
       if (!myLoadText) myText = null;
diff --git a/json/jsonSchema/src/com/jetbrains/jsonSchema/impl/JsonSchemaReader.java b/json/jsonSchema/src/com/jetbrains/jsonSchema/impl/JsonSchemaReader.java
index b1971f568b45..f15efbcd8e0a 100644
--- a/json/jsonSchema/src/com/jetbrains/jsonSchema/impl/JsonSchemaReader.java
+++ b/json/jsonSchema/src/com/jetbrains/jsonSchema/impl/JsonSchemaReader.java
@@ -4,6 +4,7 @@ import com.google.gson.TypeAdapter;
 import com.google.gson.stream.JsonReader;
 import com.google.gson.stream.JsonToken;
 import com.google.gson.stream.JsonWriter;
+import com.intellij.util.Consumer;
 import com.intellij.util.ThrowablePairConsumer;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -34,13 +35,15 @@ public class JsonSchemaReader {
     return object;
   }
 
-  public static boolean isJsonSchema(@NotNull final String string) {
+  public static boolean isJsonSchema(@NotNull final String string, Consumer<String> errorConsumer) {
     try {
       new JsonSchemaReader().read(new java.io.StringReader(string));
       return true;
     } catch (IOException e) {
+      errorConsumer.consume(e.getMessage());
       return false;
     } catch (Exception e) {
+      errorConsumer.consume(e.getMessage());
       return false;
     }
   }