#809 Fix PR suggestions (Thanks @coderabbitai).

Author: yruslan

cobol-parser/src/main/scala/za/co/absa/cobrix/cobol/reader/VarLenNestedReader.scala

@@ -153,8 +153,9 @@ class VarLenNestedReader[T: ClassTag](copybookContents: Seq[String],
       logger.info(s"Input split size = ${inputSplitSizeRecords.get} records")
     } else {
       if (inputSplitSizeMB.nonEmpty) {
-        if (inputSplitSizeMB.get < 1 || inputSplitSizeMB.get > 200000) {
-          throw new IllegalArgumentException(s"Invalid input split size of ${inputSplitSizeMB.get} MB.")
+        val maxSplitSizeMB = if (dataStream.isCompressed) 200000 else 2000
+        if (inputSplitSizeMB.get < 1 || inputSplitSizeMB.get > maxSplitSizeMB) {
+          throw new IllegalArgumentException(s"Invalid input split size of ${inputSplitSizeMB.get} MB (max allowed: $maxSplitSizeMB MB).")
         }
         logger.info(s"Input split size = ${inputSplitSizeMB.get} MB")
       }

spark-cobol/src/main/scala/za/co/absa/cobrix/spark/cobol/source/streaming/BufferedFSDataInputStream.scala

@@ -90,9 +90,9 @@ class BufferedFSDataInputStream(filePath: Path, hadoopConfig: Configuration, sta
             val available = bufferContainBytes - bufferPos
             val bytesToCopy = Math.min(lengthLeft, available)
             System.arraycopy(buffer, bufferPos, b, offsetLeft, bytesToCopy)
-            bufferPos += bufferContainBytes
-            offsetLeft += bufferContainBytes
-            lengthLeft -= bufferContainBytes
+            bufferPos += bytesToCopy
+            offsetLeft += bytesToCopy
+            lengthLeft -= bytesToCopy
           }
         }
       }
@@ -136,7 +136,7 @@ class BufferedFSDataInputStream(filePath: Path, hadoopConfig: Configuration, sta
 
     if (startOffset > 0) {
       if (codec == null) {
-        baseStream.seek(startOffset)
+        fsIn.seek(startOffset)
       } else {
         var toSkip = startOffset
         while (toSkip > 0) {

spark-cobol/src/test/scala/za/co/absa/cobrix/spark/cobol/source/integration/Test40CompressesFilesSpec.scala

@@ -161,11 +161,11 @@ class Test40CompressesFilesSpec extends AnyFunSuite with SparkTestBase with Bina
   }
 
   test("Test compressed EBCDIC gzip file with indexes") {
-    testCompressedFile("../data/test40_data/example.dat.gz")
+    testCompressedFile("../data/test40_data/example.dat.gz", useIndexes = true)
   }
 
-  test("Test compressed EBCDIC  bzip2 file with indexes") {
-    testCompressedFile("../data/test40_data/example.dat.bz2")
+  test("Test compressed EBCDIC bzip2 file with indexes") {
+    testCompressedFile("../data/test40_data/example.dat.bz2", useIndexes = true)
   }
 
   test("read mixed compressed EBCDIC files") {