Fix mod (#19855)

Author: alchemist51

plugins/engine-datafusion/jni/src/lib.rs

@@ -17,7 +17,6 @@ use std::sync::Arc;
 mod util;
 mod row_id_optimizer;
 mod listing_table;
-mod memory;
 
 use datafusion::execution::context::SessionContext;
 

server/src/main/java/org/opensearch/index/engine/exec/coord/CompositeEngine.java

@@ -73,7 +73,9 @@ public CompositeEngine(MapperService mapperService, PluginsService pluginsServic
         this.catalogSnapshot = ((LuceneCommitEngine)this.compositeEngineCommitter).readCatalogSnapshot();
 
         // remap the paths
-        this.catalogSnapshot = this.catalogSnapshot.remapPaths(shardPath.getDataPath());
+        if(this.catalogSnapshot != null) {
+            this.catalogSnapshot = this.catalogSnapshot.remapPaths(shardPath.getDataPath());
+        }
 
         this.mergeHandler = new ParquetMergeHandler(this, this.engine, this.engine.getDataFormat());
         mergeScheduler = new MergeScheduler(this.mergeHandler, this);