Springboot components do not "reset" when I send a new request? - spring-boot

Question

I have a Springboot application exposing a simple REST api, with several layers and autowired #Components, and I send a HTTP POST request to its #RestController through Postman, and in one of the subsequent components I'm doing stuff with the received data.
The problem is that when I send more requests in postman after the first has returned, the components seem to still contain information from the previous request that has already returned a response... How to avoid this? I want every request to be a "clean slate". It's almost as if it's not cleaning up when its done.. It's so annoying because I dont even know how to formulate the problem but I hope you understand.
In the following code the "actual_imported_rows" keeps increasing for subsequent requests:
#Data
#NoArgsConstructor
#Component
#Slf4j
public class StrekningImporter {
int expected_num_rows;
int actual_imported_rows;
HashMap<Long, StrekningEntity> successfulStrekning = new HashMap<>();
ArrayList<FailedImportEntry> unsuccessfulStrekning = new ArrayList<>();
public HashMap<Long, StrekningEntity> startImport(Sheet sheet, HashMap<Long, RegulativEntity> regulativHashMap,
HashMap<Long, SambandEntity> sambandHashMap) throws FailedImport {
expected_num_rows = sheet.getLastRowNum();
Iterator<Row> rows = sheet.iterator();
System.out.println("ACTUAL IMPORT SIZE: " + actual_imported_rows);
int rowNum = 0;
while (rows.hasNext()) {
// Skip header
if (rowNum == 0) {
rowNum++;
rows.next();
}
Row currentRow = rows.next();
try {
StrekningEntity strekning = iterateRow(currentRow, regulativHashMap, sambandHashMap);
successfulStrekning.put((long) strekning.getId(), strekning);
actual_imported_rows += 1;
} catch (FailedImportEntry failedImportEntry) {
unsuccessfulStrekning.add(failedImportEntry);
rowNum++;
continue;
}
rowNum++;
}
log.info("Imported Strekning : " + actual_imported_rows + " out of: " + expected_num_rows);
if (unsuccessfulStrekning.size() > 0) {
throw new FailedImport("Strekning", unsuccessfulStrekning);
}
return successfulStrekning;
}
private StrekningEntity iterateRow(Row currentRow, HashMap<Long, RegulativEntity> regulativHashMap,
HashMap<Long, SambandEntity> sambandHashMap) throws FailedImportEntry {
int strekning_id = 0;
String rutekode = "";
String vegkode = "";
int samband_id = 0;
String oppdragsgiver = "";
String fergeleie_fra = "";
String fergeleie_til = "";
double distanse = 0;
int reisetid = 0;
int regulativ_id = 0;
int sone = 0;
int sonepaslag = 0;
String vegnummer = "";
String merknad = "";
LocalDate gyldig_fra = null;
LocalDate gyldig_til = null;
StrekningEntity strekningEntity = null;
int colIndex = 0;
try {
int lastCellNum = currentRow.getLastCellNum();
for (; colIndex < lastCellNum; colIndex++) {
Cell currentCell = currentRow.getCell(colIndex);
switch (colIndex) {
case 0:
if (currentCell != null) {
strekning_id = (int) currentCell.getNumericCellValue();
}
break;
case 1:
if (currentCell != null) {
rutekode = currentCell.getStringCellValue();
}
break;
case 2:
if (currentCell != null) {
vegkode = currentCell.getStringCellValue();
}
break;
case 3:
if (currentCell != null) {
samband_id = (int) currentCell.getNumericCellValue();
}
break;
case 5:
if (currentCell != null) {
fergeleie_fra = currentCell.getStringCellValue();
}
break;
case 6:
if (currentCell != null) {
fergeleie_til = currentCell.getStringCellValue();
}
break;
case 8:
if (currentCell != null) {
break;
}
case 9:
if (currentCell != null) {
distanse = currentCell.getNumericCellValue();
}
break;
case 10:
if (currentCell != null) {
reisetid = (int) currentCell.getNumericCellValue();
}
break;
case 11:
if (currentCell != null) {
regulativ_id = (int) currentCell.getNumericCellValue();
}
break;
case 13:
if (currentCell != null) {
sone = (int) currentCell.getNumericCellValue();
}
break;
case 14:
if (currentCell != null) {
sonepaslag = (int) currentCell.getNumericCellValue();
}
break;
case 16:
if (currentCell != null) {
vegnummer = currentCell.getStringCellValue();
}
break;
case 17:
if (currentCell != null) {
merknad = currentCell.getStringCellValue();
}
break;
case 18:
if (currentCell != null) {
gyldig_fra = currentCell.getLocalDateTimeCellValue().toLocalDate();
}
break;
case 19:
if (currentCell != null) {
gyldig_til = currentCell.getLocalDateTimeCellValue().toLocalDate();
}
break;
default:
break;
}
}
SambandEntity samband = sambandHashMap.get((long) samband_id);
RegulativEntity regulativ = regulativHashMap.get((long) regulativ_id);
strekningEntity = new StrekningEntity((short) strekning_id, samband, fergeleie_fra, fergeleie_til,
(int) distanse, reisetid, regulativ, null, (short) sone, (short) sonepaslag, false, merknad, gyldig_fra,
gyldig_til, null);
} catch (Exception e) {
FailedImportEntry failedImportEntry = new FailedImportEntry(currentRow.getRowNum(), colIndex,
"class: " + e.getClass() + " | message: " + e.getMessage());
throw failedImportEntry;
}
return strekningEntity;
}
}
Any help or hints where the problem lies would be greatly appreciated :)