Source:
<code>public List<BatchResult> doFlushStatements(boolean isRollback) throws SQLException { try { List<BatchResult> results = new ArrayList<BatchResult>(); if (isRollback) { return Collections.emptyList(); } for (int i = 0, n = statementList.size(); i < n; i++) { Statement stmt = statementList.get(i); applyTransactionTimeout(stmt); BatchResult batchResult = batchResultList.get(i); try { batchResult.setUpdateCounts(stmt.executeBatch()); MappedStatement ms = batchResult.getMappedStatement(); List<Object> parameterObjects = batchResult.getParameterObjects(); KeyGenerator keyGenerator = ms.getKeyGenerator(); if (Jdbc3KeyGenerator.class.equals(keyGenerator.getClass())) { Jdbc3KeyGenerator jdbc3KeyGenerator = (Jdbc3KeyGenerator) keyGenerator; jdbc3KeyGenerator.processBatch(ms, stmt, parameterObjects); } else if (!NoKeyGenerator.class.equals(keyGenerator.getClass())) { for (Object parameter : parameterObjects) { keyGenerator.processAfter(this, ms, stmt, parameter); } } closeStatement(stmt); } catch (BatchUpdateException e) { StringBuilder message = new StringBuilder(); message.append(batchResult.getMappedStatement().getId()) .append(" (batch index #") .append(i + 1) .append(")") .append(" failed."); if (i > 0) { message.append(" ") .append(i) .append(" prior sub executor(s) completed successfully, but will be rolled back."); } throw new BatchExecutorException(message.toString(), e, results, batchResult); } results.add(batchResult); } return results; <START> } finally { <END> currentSql = null; statementList.clear(); batchResultList.clear(); } }</code><technical_language>In this changes, If exception occurred statement execution, I is a case statement close</technical_language>

Target:
public List<BatchResult> doFlushStatements(boolean isRollback) throws SQLException { try { List<BatchResult> results = new ArrayList<BatchResult>(); if (isRollback) { return Collections.emptyList(); } for (int i = 0, n = statementList.size(); i < n; i++) { Statement stmt = statementList.get(i); applyTransactionTimeout(stmt); BatchResult batchResult = batchResultList.get(i); try { batchResult.setUpdateCounts(stmt.executeBatch()); MappedStatement ms = batchResult.getMappedStatement(); List<Object> parameterObjects = batchResult.getParameterObjects(); KeyGenerator keyGenerator = ms.getKeyGenerator(); if (Jdbc3KeyGenerator.class.equals(keyGenerator.getClass())) { Jdbc3KeyGenerator jdbc3KeyGenerator = (Jdbc3KeyGenerator) keyGenerator; jdbc3KeyGenerator.processBatch(ms, stmt, parameterObjects); } else if (!NoKeyGenerator.class.equals(keyGenerator.getClass())) { for (Object parameter : parameterObjects) { keyGenerator.processAfter(this, ms, stmt, parameter); } } closeStatement(stmt); } catch (BatchUpdateException e) { StringBuilder message = new StringBuilder(); message.append(batchResult.getMappedStatement().getId()) .append(" (batch index #") .append(i + 1) .append(")") .append(" failed."); if (i > 0) { message.append(" ") .append(i) .append(" prior sub executor(s) completed successfully, but will be rolled back."); } throw new BatchExecutorException(message.toString(), e, results, batchResult); } results.add(batchResult); } return results; } finally { for (Statement stmt : statementList) { closeStatement(stmt); } currentSql = null; statementList.clear(); batchResultList.clear(); } }