Fixed ingest pipeline script issue

modules/ingest-common/src/main/java/org/opensearch/ingest/common/ScriptProcessor.java

@@ -102,8 +102,11 @@ public IngestDocument execute(IngestDocument document) {
         } else {
             ingestScript = precompiledIngestScript;
         }
-        ingestScript.execute(document.getSourceAndMetadata());
-        CollectionUtils.ensureNoSelfReferences(document.getSourceAndMetadata(), "ingest script");
+        IngestDocument mutableDocument = new IngestDocument(document);
+        ingestScript.execute(mutableDocument.getSourceAndMetadata());
+        CollectionUtils.ensureNoSelfReferences(mutableDocument.getSourceAndMetadata(), "ingest script");
+        document.getSourceAndMetadata().clear();
+        document.getSourceAndMetadata().putAll(mutableDocument.getSourceAndMetadata());
         return document;
     }
 

modules/ingest-common/src/test/java/org/opensearch/ingest/common/ScriptProcessorTests.java

@@ -105,4 +105,16 @@ private void assertIngestDocument(IngestDocument ingestDocument) {
         int bytesTotal = ingestDocument.getFieldValue("bytes_in", Integer.class) + ingestDocument.getFieldValue("bytes_out", Integer.class);
         assertThat(ingestDocument.getSourceAndMetadata().get("bytes_total"), is(bytesTotal));
     }
+
+    public void testScriptingWithSelfReferencingSourceMetadata() {
+        ScriptProcessor processor = new ScriptProcessor(randomAlphaOfLength(10), null, script, null, scriptService);
+        IngestDocument originalIngestDocument = randomDocument();
+        String index = originalIngestDocument.getSourceAndMetadata().get(IngestDocument.Metadata.INDEX.getFieldName()).toString();
+        String id = originalIngestDocument.getSourceAndMetadata().get(IngestDocument.Metadata.ID.getFieldName()).toString();
+        Map<String, Object> sourceMetadata = originalIngestDocument.getSourceAndMetadata();
+        originalIngestDocument.getSourceAndMetadata().put("_source", sourceMetadata);
+        IngestDocument ingestDocument = new IngestDocument(index, id, null, null, null, originalIngestDocument.getSourceAndMetadata());
+        expectThrows(IllegalArgumentException.class, () -> processor.execute(ingestDocument));
+    }
+
 }

modules/ingest-common/src/yamlRestTest/resources/rest-api-spec/test/ingest/190_script_processor.yml

@@ -202,3 +202,79 @@ teardown:
         id: 1
   - match: { _source.source_field: "foo%20bar" }
   - match: { _source.target_field: "foo bar" }
+
+---
+"Test self referencing source with ignore failure":
+  - do:
+      ingest.put_pipeline:
+        id: "my_pipeline"
+        body:  >
+          {
+            "description": "_description",
+            "processors": [
+              {
+                "script" : {
+                  "lang": "painless",
+                  "source" : "ctx.foo['foo']=ctx.foo;ctx['test-field']='test-value'",
+                  "ignore_failure": true
+                }
+              },
+              {
+                "script" : {
+                  "lang": "painless",
+                  "source" : "ctx.target_field = Processors.uppercase(ctx.source_field)"
+                }
+              }
+            ]
+          }
+  - match: { acknowledged: true }
+
+  - do:
+      index:
+        index: test
+        id: 1
+        pipeline: "my_pipeline"
+        body: {source_field: "fooBar", foo: {foo: "bar"}}
+
+  - do:
+      get:
+        index: test
+        id: 1
+  - match: { _source.source_field: "fooBar" }
+  - match: { _source.target_field: "FOOBAR"}
+  - match: { _source.test-field: null}
+
+---
+"Test self referencing source without ignoring failure":
+  - do:
+      ingest.put_pipeline:
+        id: "my_pipeline"
+        body:  >
+          {
+            "description": "_description",
+            "processors": [
+              {
+                "script" : {
+                  "lang": "painless",
+                  "source" : "ctx.foo['foo']=ctx.foo;ctx['test-field']='test-value'"
+                }
+              },
+              {
+                "script" : {
+                  "lang": "painless",
+                  "source" : "ctx.target_field = Processors.uppercase(ctx.source_field)"
+                }
+              }
+            ]
+          }
+  - match: { acknowledged: true }
+
+  - do:
+      catch: bad_request
+      index:
+        index: test
+        id: 1
+        pipeline: "my_pipeline"
+        body: {source_field: "fooBar", foo: {foo: "bar"}}
+  - match: { error.root_cause.0.type: "illegal_argument_exception" }
+  - match: { error.root_cause.0.reason: "Iterable object is self-referencing itself (ingest script)" }

modules/ingest-common/src/yamlRestTest/resources/rest-api-spec/test/ingest/90_simulate.yml

@@ -1113,3 +1113,48 @@ teardown:
   - match: { status: 400 }
   - match: { error.root_cause.0.type: "illegal_argument_exception" }
   - match: { error.root_cause.0.reason: "Failed to parse parameter [_if_primary_term], only int or long is accepted" }
+
+---
+"Test simulate with pipeline with ignore failure and cyclic field assignments in script":
+  - do:
+      ingest.simulate:
+        verbose: true
+        body: >
+          {
+            "pipeline": {
+              "description": "_description",
+              "processors": [
+                {
+                  "script" : {
+                    "ignore_failure" : true,
+                    "lang": "painless",
+                    "source": "ctx.foo['foo']=ctx.foo;ctx.tag='recursive'"
+                  }
+                },
+                {
+                  "script" : {
+                    "lang": "painless",
+                    "source" : "ctx.target_field = Processors.uppercase(ctx.foo.foo)"
+                  }
+                }
+              ]
+            },
+            "docs": [
+              {
+                "_source": {
+                  "foo": {
+                    "foo": "bar"
+                  }
+                }
+              }
+            ]
+          }
+  - length: { docs: 1 }
+  - length: { docs.0.processor_results: 2 }
+  - match: { docs.0.processor_results.0.status: "error_ignored" }
+  - match: { docs.0.processor_results.0.ignored_error.error.type: "illegal_argument_exception" }
+  - match: { docs.0.processor_results.0.doc._source.tag: null }
+  - match: { docs.0.processor_results.1.doc._source.target_field: "BAR" }
+  - match: { docs.0.processor_results.1.doc._source.foo.foo: "bar" }
+  - match: { docs.0.processor_results.1.status: "success" }
+  - match: { docs.0.processor_results.1.processor_type: "script" }

server/src/main/java/org/opensearch/ingest/IngestDocument.java

@@ -33,6 +33,7 @@
 package org.opensearch.ingest;
 
 import org.opensearch.core.common.Strings;
+import org.opensearch.core.common.util.CollectionUtils;
 import org.opensearch.index.VersionType;
 import org.opensearch.index.mapper.IdFieldMapper;
 import org.opensearch.index.mapper.IndexFieldMapper;
@@ -752,6 +753,7 @@ public Map<String, Object> getSourceAndMetadata() {
 
     @SuppressWarnings("unchecked")
     public static <K, V> Map<K, V> deepCopyMap(Map<K, V> source) {
+        CollectionUtils.ensureNoSelfReferences(source, "IngestDocument: Self reference present in object.");
         return (Map<K, V>) deepCopy(source);
     }
 

server/src/test/java/org/opensearch/ingest/IngestDocumentTests.java

@@ -95,6 +95,12 @@ public void setTestIngestDocument() {
         ingestDocument = new IngestDocument("index", "id", null, null, null, document);
     }
 
+    public void testSelfReferencingSource() {
+        Map<String, Object> value = new HashMap<>();
+        value.put("foo", value);
+        expectThrows(IllegalArgumentException.class, () -> IngestDocument.deepCopyMap(value));
+    }
+
     public void testSimpleGetFieldValue() {
         assertThat(ingestDocument.getFieldValue("foo", String.class), equalTo("bar"));
         assertThat(ingestDocument.getFieldValue("int", Integer.class), equalTo(123));