improve spillableMapBasePath disk directory is full

Author: XuQianJin-Stars

hudi-common/src/main/java/org/apache/hudi/common/table/log/HoodieMergedLogRecordScanner.java

@@ -94,8 +94,8 @@ protected HoodieMergedLogRecordScanner(FileSystem fs, String basePath, List<Stri
         instantRange, withOperationField,
         forceFullScan, partitionName, internalSchema);
     try {
-      String[] dirs = FileIOUtils.getConfiguredLocalDirs();
-      spillableMapBasePath = dirs.length > 0 ? dirs[0] : spillableMapBasePath;
+      String[] localDirs = FileIOUtils.getConfiguredLocalDirs();
+      spillableMapBasePath = localDirs.length > 0 ? localDirs[0] : spillableMapBasePath;
       // Store merged records for all versions for this log file, set the in-memory footprint to maxInMemoryMapSize
       this.records = new ExternalSpillableMap<>(maxMemorySizeInBytes, spillableMapBasePath, new DefaultSizeEstimator(),
           new HoodieRecordSizeEstimator(readerSchema), diskMapType, isBitCaskDiskMapCompressionEnabled);