alibaba/spring-ai-alibaba · warning

会话不存在

Error message

会话不存在: {}

What it means

ChatSessionServiceImpl.getSession looks up a session in the in-memory sessionStore by id. If the id is missing/blank it returns null quietly; if no session exists for the id it logs '会话不存在' (session not found) and returns null. Callers must handle a null return.

Solutions

1. Verify the sessionId passed by the client is the one returned from session creation
2. Persist sessions in a shared store (Redis/DB) or enable sticky sessions for multi-instance deployments
3. Treat null return as 'session not found' and create a new session instead of proceeding
4. Check session expiry settings (isSessionExpired) — the session may have been evicted

Example fix

// before
ChatSession s = service.getSession(sessionId);
s.getMessages(); // NPE if not found
// after
ChatSession s = service.getSession(sessionId);
if (s == null) { s = service.createSession(); }

if (sessionId == null || sessionId.isBlank()) throw new IllegalArgumentException("sessionId is required");

ChatSession s = service.getSession(sessionId);
if (s == null) { /* treat as not-found: create new or return 404 */ }

ChatSession s = service.getSession(sessionId);
if (s == null) {
    return ResponseEntity.status(HttpStatus.NOT_FOUND).body("session not found: " + sessionId);
}

When it happens

Trigger: session -> getSession with a sessionId that was never created, was already deleted, or belonged to a different server instance (in-memory store, not shared across replicas or lost on restart).

Common situations: Client retrying with an old sessionId after server restart; load balancer routing to a replica that doesn't hold the session; expired sessions evicted; hardcoded/stale session ids in tests.

Understand the failure class

Background: Record Not Found Errors: "not found", RecordNotFound, and "was not found" — what they mean and how to fix them — this error's family across 28 libraries.

Related errors

• Dataset version not found
• 会话不存在:
• 实验不存在
• 会话 不存在，创建新会话
• 未找到ID为 的评测集

AI-assisted analysis of alibaba/spring-ai-alibaba@f82da0b50f (2026-09-09). Data as JSON: /api/errors/dc85e9f26da3fc1a. Report an issue: GitHub.

Appendix: source

Thrown at spring-ai-alibaba-admin/spring-ai-alibaba-admin-server-start/src/main/java/com/alibaba/cloud/ai/studio/admin/service/impl/ChatSessionServiceImpl.java:77

    public ChatSession createEvaluatorSession(String prompt, String variables, String modelConfig) {
        String sessionId = UUID.randomUUID().toString();
        ModelConfigInfo modelConfigInfo = modelConfigParser.checkAndGetModelConfigInfo(modelConfig);
        ChatSession session = ChatSession.builder().template(prompt).variables(variables).modelConfig(modelConfigInfo)
                .sessionId(sessionId).createTime(System.currentTimeMillis()).lastUpdateTime(System.currentTimeMillis())
                .build();
        sessionStore.put(sessionId, session);
        return session;
    }
    
    @Override
    public ChatSession getSession(String sessionId) {
        if (sessionId == null || sessionId.trim().isEmpty()) {
            return null;
        }
        
        ChatSession session = sessionStore.get(sessionId);
        if (session == null) {
            log.warn("会话不存在: {}", sessionId);
            return null;
        }
        
        // 检查会话是否过期
        if (isSessionExpired(session)) {
            log.info("会话已过期，删除: {}", sessionId);
            sessionStore.remove(sessionId);
            return null;
        }
        
        return session;
    }
    
    @Override
    public void updateSession(ChatSession session) {
        if (session != null && session.getSessionId() != null) {
            session.setLastUpdateTime(System.currentTimeMillis());
            sessionStore.put(session.getSessionId(), session);

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