fix: AI助评失败记录不再抛错卡死，PROCESSING超时可重试，报错信息精简

src/main/java/com/sztzjy/linkCommerce/config/exception/handler/GlobalExceptionHandler.java

@@ -4,6 +4,8 @@ import com.sztzjy.linkCommerce.config.exception.UnAuthorizedException;
 import com.sztzjy.linkCommerce.util.ResultEntity;
 import com.sztzjy.linkCommerce.util.ThrowableUtil;
 import lombok.extern.slf4j.Slf4j;
+import org.apache.ibatis.exceptions.PersistenceException;
+import org.springframework.dao.DataAccessException;
 import org.springframework.http.HttpStatus;
 import org.springframework.security.access.AccessDeniedException;
 import org.springframework.security.authentication.BadCredentialsException;
@@ -13,6 +15,8 @@ import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
 
+import java.sql.SQLException;
+
 /**
  * 全局异常处理
  */
@@ -20,6 +24,8 @@ import org.springframework.web.bind.annotation.RestControllerAdvice;
 @RestControllerAdvice
 public class GlobalExceptionHandler {
 
+    private static final String DATABASE_ERROR_MESSAGE = "系统繁忙，请稍后重试";
+
     @ExceptionHandler(IllegalArgumentException.class)
     public ResultEntity<String> illegalArgumentException(IllegalArgumentException e) {
         log.error(ThrowableUtil.getStackTrace(e));
@@ -61,9 +67,22 @@ public class GlobalExceptionHandler {
     @ExceptionHandler(Throwable.class)
     public ResultEntity<String> nullPointerException(Throwable e) {
         log.error(ThrowableUtil.getStackTrace(e));
+        if (isDatabaseException(e)) {
+            // 数据库异常原文包含完整 SQL 和表结构，只记日志，不返回给前端
+            return new ResultEntity<>(HttpStatus.BAD_REQUEST, DATABASE_ERROR_MESSAGE);
+        }
         return new ResultEntity<>(HttpStatus.BAD_REQUEST, e.getMessage());
     }
 
+    private static boolean isDatabaseException(Throwable e) {
+        for (Throwable t = e; t != null; t = t.getCause() == t ? null : t.getCause()) {
+            if (t instanceof DataAccessException || t instanceof PersistenceException || t instanceof SQLException) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     /**
      * BadCredentialsException
      */

src/main/java/com/sztzjy/linkCommerce/service/impl/AiTrainingEvaluationServiceImpl.java

@@ -21,6 +21,7 @@ import com.sztzjy.linkCommerce.mapper.TrainingTaskClassConfigMapper;
 import com.sztzjy.linkCommerce.service.AiTrainingEvaluationService;
 import com.sztzjy.linkCommerce.service.TrainingKnowledgeService;
 import com.sztzjy.linkCommerce.training.knowledge.EffectiveTrainingTaskContent;
+import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
@@ -34,11 +35,16 @@ import java.util.Date;
 import java.util.List;
 import java.util.UUID;
 
+@Slf4j
 @Service
 public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationService {
     private static final String NOT_STARTED = "NOT_STARTED";
     private static final String PROCESSING = "PROCESSING";
     private static final String SUCCEEDED = "SUCCEEDED";
+    private static final String FAILURE_MESSAGE = "AI服务暂时不可用，请稍后重试";
+    // 与 AiTrainingEvaluationMapper.xml 中 claimHelp/claimAssessment 的 INTERVAL 10 MINUTE 保持一致
+    private static final long PROCESSING_TIMEOUT_MILLIS = 10 * 60 * 1000L;
+    private static final int LOGGED_RAW_RESPONSE_LENGTH = 500;
     private static final int MAX_ERROR_LENGTH = 1000;
     private static final int MAX_HELP_QUESTION_LENGTH = 500;
     private static final int MAX_STEP_CONTEXT_LENGTH = 2000;
@@ -82,7 +88,7 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
         String normalizedStepContext = normalizeStepContext(stepContext);
         EvaluationContext context = resolveContext(taskKey, user, true);
         AiTrainingEvaluation evaluation = getOrCreate(context, user);
-        if (PROCESSING.equals(evaluation.getHelpStatus())) {
+        if (PROCESSING.equals(evaluation.getHelpStatus()) && !isProcessingTimedOut(evaluation)) {
             return toView(evaluation);
         }
         if (aiTrainingEvaluationMapper.claimHelp(evaluation.getId(), new Date()) != 1) {
@@ -110,7 +116,7 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
             completed.setAssessmentStatus(evaluation.getAssessmentStatus());
             return toView(completed);
         } catch (RuntimeException e) {
-            aiTrainingEvaluationMapper.failHelp(evaluation.getId(), cappedMessage(e), new Date());
+            recordHelpFailure(evaluation.getId(), e);
             throw asServiceException(e);
         }
     }
@@ -119,7 +125,7 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
     public AiTrainingEvaluationView generateAssessment(String taskKey, JwtUser user) {
         EvaluationContext context = resolveContext(taskKey, user, true);
         AiTrainingEvaluation evaluation = getOrCreate(context, user);
-        if (PROCESSING.equals(evaluation.getAssessmentStatus())) {
+        if (PROCESSING.equals(evaluation.getAssessmentStatus()) && !isProcessingTimedOut(evaluation)) {
             return toView(evaluation);
         }
         String answerSnapshot = answerSnapshot(context.answer);
@@ -159,7 +165,7 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
             completed.setAssessmentStatus(SUCCEEDED);
             return toView(completed);
         } catch (RuntimeException e) {
-            aiTrainingEvaluationMapper.failAssessment(evaluation.getId(), cappedMessage(e), rawResponse, new Date());
+            recordAssessmentFailure(evaluation.getId(), e, rawResponse);
             throw asServiceException(e);
         }
     }
@@ -548,16 +554,57 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
         return view;
     }
 
-    private String cappedMessage(RuntimeException exception) {
+    /**
-        String message = StringUtils.defaultIfBlank(exception.getMessage(), "AI evaluation failed");
+     * 落库的失败原因：只保存我们自己抛出的 ServiceException 文案，
-        return StringUtils.left(message, MAX_ERROR_LENGTH);
+     * 其余异常（数据库、网络等）的原文只写日志，避免把 SQL 等长文本存进库或带给前端。
+     */
+    private String storedFailureMessage(RuntimeException exception) {
+        if (exception instanceof ServiceException && StringUtils.isNotBlank(exception.getMessage())) {
+            return StringUtils.left(exception.getMessage(), MAX_ERROR_LENGTH);
+        }
+        return FAILURE_MESSAGE;
     }
 
-    private ServiceException asServiceException(RuntimeException exception) {
+    /**
-        if (exception instanceof ServiceException) {
+     * 记录失败状态本身出错时不能再往外抛：否则会盖掉真正的失败原因，
-            return (ServiceException) exception;
+     * 并让记录一直停在 PROCESSING，学生无法重试。
+     */
+    private void recordHelpFailure(String evaluationId, RuntimeException cause) {
+        log.warn("AI help failed, evaluationId={}", evaluationId, cause);
+        try {
+            aiTrainingEvaluationMapper.failHelp(evaluationId, storedFailureMessage(cause), new Date());
+        } catch (RuntimeException recordError) {
+            log.error("Could not record AI help failure, evaluationId={}", evaluationId, recordError);
+        }
+    }
+
+    private void recordAssessmentFailure(String evaluationId, RuntimeException cause, String rawResponse) {
+        log.warn("AI assessment failed, evaluationId={}", evaluationId, cause);
+        String message = storedFailureMessage(cause);
+        try {
+            aiTrainingEvaluationMapper.failAssessment(evaluationId, message, rawResponse, new Date());
+            return;
+        } catch (RuntimeException recordError) {
+            log.warn("Could not record AI assessment failure with the raw response, retrying without it, evaluationId={}, rawResponse={}",
+                    evaluationId, StringUtils.left(rawResponse, LOGGED_RAW_RESPONSE_LENGTH), recordError);
         }
-        return new ServiceException(HttpStatus.BAD_GATEWAY, "AI evaluation failed");
+        try {
+            aiTrainingEvaluationMapper.failAssessment(evaluationId, message, null, new Date());
+        } catch (RuntimeException recordError) {
+            log.error("Could not record AI assessment failure, evaluationId={}", evaluationId, recordError);
+        }
+    }
+
+    private boolean isProcessingTimedOut(AiTrainingEvaluation evaluation) {
+        Date updatedAt = evaluation.getUpdateTime();
+        return updatedAt != null && System.currentTimeMillis() - updatedAt.getTime() > PROCESSING_TIMEOUT_MILLIS;
+    }
+
+    private ServiceException asServiceException(RuntimeException exception) {
+        HttpStatus status = exception instanceof ServiceException && ((ServiceException) exception).getCode() != null
+                ? ((ServiceException) exception).getCode()
+                : HttpStatus.BAD_GATEWAY;
+        return new ServiceException(status, FAILURE_MESSAGE);
     }
 
     private static class AssessmentCriterionPlan {

src/main/resources/mappers/AiTrainingEvaluationMapper.xml

@@ -61,14 +61,16 @@
     UPDATE ai_training_evaluation
     SET help_status = 'PROCESSING', help_error_message = NULL, update_time = #{updateTime,jdbcType=TIMESTAMP}
     WHERE id = #{id,jdbcType=VARCHAR}
-      AND help_status IN ('NOT_STARTED', 'FAILED', 'SUCCEEDED')
+      AND (help_status IN ('NOT_STARTED', 'FAILED', 'SUCCEEDED')
+           OR (help_status = 'PROCESSING' AND update_time < DATE_SUB(#{updateTime,jdbcType=TIMESTAMP}, INTERVAL 10 MINUTE)))
   </update>
 
   <update id="claimAssessment">
     UPDATE ai_training_evaluation
     SET assessment_status = 'PROCESSING', assessment_error_message = NULL, update_time = #{updateTime,jdbcType=TIMESTAMP}
     WHERE id = #{id,jdbcType=VARCHAR}
-      AND assessment_status IN ('NOT_STARTED', 'FAILED')
+      AND (assessment_status IN ('NOT_STARTED', 'FAILED')
+           OR (assessment_status = 'PROCESSING' AND update_time &lt; DATE_SUB(#{updateTime,jdbcType=TIMESTAMP}, INTERVAL 10 MINUTE)))
   </update>
 
   <update id="claimReassessment">

src/test/java/com/sztzjy/linkCommerce/config/exception/handler/GlobalExceptionHandlerTest.java

@@ -0,0 +1,59 @@
+package com.sztzjy.linkCommerce.config.exception.handler;
+
+import com.sztzjy.linkCommerce.util.ResultEntity;
+import org.apache.ibatis.exceptions.PersistenceException;
+import org.junit.jupiter.api.Test;
+import org.springframework.jdbc.BadSqlGrammarException;
+
+import java.sql.SQLException;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class GlobalExceptionHandlerTest {
+    private final GlobalExceptionHandler handler = new GlobalExceptionHandler();
+
+    @Test
+    void databaseExceptionsReturnShortMessageWithoutSql() {
+        PersistenceException e = new PersistenceException(
+                "\n### Error updating database.  Cause: java.sql.SQLException: Incorrect string value"
+                        + "\n### SQL: UPDATE ai_training_evaluation SET assessment_raw_response = ?");
+
+        ResultEntity<String> result = handler.nullPointerException(e);
+
+        assertShortAndClean(result.getBody().getMsg());
+    }
+
+    @Test
+    void springJdbcExceptionsReturnShortMessageWithoutSql() {
+        BadSqlGrammarException e = new BadSqlGrammarException("PreparedStatementCallback",
+                "select p.question from platform_question p", new SQLException("syntax error near 'x'"));
+
+        ResultEntity<String> result = handler.nullPointerException(e);
+
+        assertShortAndClean(result.getBody().getMsg());
+    }
+
+    @Test
+    void wrappedSqlExceptionIsAlsoShortened() {
+        RuntimeException e = new RuntimeException("### Could not execute: select * from ai_training_evaluation",
+                new SQLException("Incorrect string value: '\\xC9'"));
+
+        ResultEntity<String> result = handler.nullPointerException(e);
+
+        assertShortAndClean(result.getBody().getMsg());
+    }
+
+    @Test
+    void ordinaryBusinessMessagesAreUnchanged() {
+        ResultEntity<String> result = handler.nullPointerException(new RuntimeException("考试不存在或无权访问"));
+
+        assertEquals("考试不存在或无权访问", result.getBody().getMsg());
+    }
+
+    private static void assertShortAndClean(String message) {
+        assertTrue(message != null && message.length() <= 30, "message: " + message);
+        assertTrue(!message.contains("###") && !message.contains("SQL") && !message.contains("select "),
+                "internal detail leaked: " + message);
+    }
+}

src/test/java/com/sztzjy/linkCommerce/service/impl/AiTrainingEvaluationServiceImplTest.java

@@ -501,6 +501,124 @@ class AiTrainingEvaluationServiceImplTest {
         verify(service.qwenChatClient, never()).completeJson(any(), any());
     }
 
+    @Test
+    void recentProcessingAssessmentIsNotReclaimed() {
+        AiTrainingEvaluationServiceImpl service = serviceWithContext(answer("answer-1", "step one", null, null, null));
+        AiTrainingEvaluation evaluation = evaluation("NOT_STARTED", "PROCESSING");
+        evaluation.setUpdateTime(minutesAgo(1));
+        when(service.aiTrainingEvaluationMapper.findByStudentClassAndTask("stu-1", "class-1", "task-1")).thenReturn(evaluation);
+
+        AiTrainingEvaluationView view = service.generateAssessment("new-product-survey", student());
+
+        assertEquals("PROCESSING", view.getAssessmentStatus());
+        verify(service.aiTrainingEvaluationMapper, never()).claimAssessment(any(), any(Date.class));
+        verify(service.qwenChatClient, never()).completeJson(any(), any());
+    }
+
+    @Test
+    void staleProcessingAssessmentIsReclaimedSoStudentIsNotStuckForever() {
+        AiTrainingEvaluationServiceImpl service = serviceWithContext(answer("answer-1", "step one", null, null, null));
+        AiTrainingEvaluation evaluation = evaluation("NOT_STARTED", "PROCESSING");
+        evaluation.setUpdateTime(minutesAgo(11));
+        when(service.aiTrainingEvaluationMapper.findByStudentClassAndTask("stu-1", "class-1", "task-1")).thenReturn(evaluation);
+        when(service.aiTrainingEvaluationMapper.claimAssessment(eq("evaluation-1"), any(Date.class))).thenReturn(1);
+        when(service.qwenChatClient.completeJson(any(), any())).thenReturn(assessmentJson());
+        when(service.aiTrainingEvaluationMapper.completeAssessment(any(AiTrainingEvaluation.class))).thenReturn(1);
+        when(service.studentTrainingAnswerMapper.updateAiAssessmentScore(eq("answer-1"), eq(86), any(Date.class))).thenReturn(1);
+
+        AiTrainingEvaluationView view = service.generateAssessment("new-product-survey", student());
+
+        assertEquals(Integer.valueOf(86), view.getAssessmentScore());
+        verify(service.aiTrainingEvaluationMapper).claimAssessment(eq("evaluation-1"), any(Date.class));
+    }
+
+    @Test
+    void failureRecordingErrorFallsBackToShortRecordAndKeepsStudentRetryable() {
+        AiTrainingEvaluationServiceImpl service = serviceWithContext(answer("answer-1", "step one", null, null, null));
+        AiTrainingEvaluation evaluation = evaluation("NOT_STARTED", "NOT_STARTED");
+        String invalidResponse = assessmentJson().replace("\"maxScore\":25", "\"maxScore\":24");
+        when(service.aiTrainingEvaluationMapper.findByStudentClassAndTask("stu-1", "class-1", "task-1"))
+                .thenReturn(null, evaluation);
+        when(service.aiTrainingEvaluationMapper.claimAssessment(eq("evaluation-1"), any(Date.class))).thenReturn(1);
+        when(service.qwenChatClient.completeJson(any(), any())).thenReturn(invalidResponse);
+        when(service.aiTrainingEvaluationMapper.failAssessment(eq("evaluation-1"), any(), eq(invalidResponse), any(Date.class)))
+                .thenThrow(new org.apache.ibatis.exceptions.PersistenceException(longDatabaseMessage()));
+        when(service.aiTrainingEvaluationMapper.failAssessment(eq("evaluation-1"), any(), isNull(), any(Date.class))).thenReturn(1);
+
+        ServiceException thrown = assertThrows(ServiceException.class,
+                () -> service.generateAssessment("new-product-survey", student()));
+
+        assertShortFriendlyMessage(thrown.getMessage());
+        verify(service.aiTrainingEvaluationMapper).failAssessment(eq("evaluation-1"), any(), isNull(), any(Date.class));
+    }
+
+    @Test
+    void failureRecordingBothAttemptsFailingStillReturnsShortError() {
+        AiTrainingEvaluationServiceImpl service = serviceWithContext(answer("answer-1", "step one", null, null, null));
+        AiTrainingEvaluation evaluation = evaluation("NOT_STARTED", "NOT_STARTED");
+        when(service.aiTrainingEvaluationMapper.findByStudentClassAndTask("stu-1", "class-1", "task-1"))
+                .thenReturn(null, evaluation);
+        when(service.aiTrainingEvaluationMapper.claimAssessment(eq("evaluation-1"), any(Date.class))).thenReturn(1);
+        when(service.qwenChatClient.completeJson(any(), any())).thenThrow(new IllegalStateException("upstream"));
+        when(service.aiTrainingEvaluationMapper.failAssessment(any(), any(), any(), any(Date.class)))
+                .thenThrow(new org.apache.ibatis.exceptions.PersistenceException(longDatabaseMessage()));
+
+        ServiceException thrown = assertThrows(ServiceException.class,
+                () -> service.generateAssessment("new-product-survey", student()));
+
+        assertShortFriendlyMessage(thrown.getMessage());
+    }
+
+    @Test
+    void helpFailureRecordingErrorStillReturnsShortError() {
+        AiTrainingEvaluationServiceImpl service = serviceWithContext(answer("answer-1", "step one", null, null, null));
+        AiTrainingEvaluation evaluation = evaluation("NOT_STARTED", "NOT_STARTED");
+        when(service.aiTrainingEvaluationMapper.findByStudentClassAndTask("stu-1", "class-1", "task-1"))
+                .thenReturn(null, evaluation);
+        when(service.aiTrainingEvaluationMapper.claimHelp(eq("evaluation-1"), any(Date.class))).thenReturn(1);
+        when(service.qwenChatClient.completeJson(any(), any())).thenThrow(new IllegalStateException("upstream"));
+        when(service.aiTrainingEvaluationMapper.failHelp(any(), any(), any(Date.class)))
+                .thenThrow(new org.apache.ibatis.exceptions.PersistenceException(longDatabaseMessage()));
+
+        ServiceException thrown = assertThrows(ServiceException.class,
+                () -> service.generateHelp("new-product-survey", student(), "如何完善调研证据？"));
+
+        assertShortFriendlyMessage(thrown.getMessage());
+    }
+
+    @Test
+    void storedFailureMessageNeverContainsInternalExceptionText() {
+        AiTrainingEvaluationServiceImpl service = serviceWithContext(answer("answer-1", "step one", null, null, null));
+        AiTrainingEvaluation evaluation = evaluation("NOT_STARTED", "NOT_STARTED");
+        when(service.aiTrainingEvaluationMapper.findByStudentClassAndTask("stu-1", "class-1", "task-1"))
+                .thenReturn(null, evaluation);
+        when(service.aiTrainingEvaluationMapper.claimAssessment(eq("evaluation-1"), any(Date.class))).thenReturn(1);
+        when(service.qwenChatClient.completeJson(any(), any())).thenThrow(new IllegalStateException(longDatabaseMessage()));
+        when(service.aiTrainingEvaluationMapper.failAssessment(any(), any(), any(), any(Date.class))).thenReturn(1);
+
+        assertThrows(ServiceException.class, () -> service.generateAssessment("new-product-survey", student()));
+
+        ArgumentCaptor<String> stored = ArgumentCaptor.forClass(String.class);
+        verify(service.aiTrainingEvaluationMapper).failAssessment(eq("evaluation-1"), stored.capture(), any(), any(Date.class));
+        assertShortFriendlyMessage(stored.getValue());
+    }
+
+    private static String longDatabaseMessage() {
+        return "\n### Error updating database.  Cause: java.sql.SQLException: Incorrect string value"
+                + "\n### SQL: UPDATE ai_training_evaluation SET assessment_raw_response = ? WHERE id = ?";
+    }
+
+    private static void assertShortFriendlyMessage(String message) {
+        assertNotNull(message);
+        assertTrue(message.length() <= 60, "message too long: " + message);
+        assertTrue(!message.contains("###") && !message.contains("SQL") && !message.contains("Exception"),
+                "internal detail leaked: " + message);
+    }
+
+    private static Date minutesAgo(int minutes) {
+        return new Date(System.currentTimeMillis() - minutes * 60_000L);
+    }
+
     @Test
     void rejectsNonStudentJwtUser() {
         AiTrainingEvaluationServiceImpl service = serviceWithContext(answer("answer-1", "step one", null, null, null));