Missing details in Error Payload

首先跟踪 cf-java-client 中的 ClientV3Exception 和 Error payload 处理，并以此 issue 中的 JSON 响应和 test_mode_info 示例作为参考。服务器端上下文位于 errors_controller.rb，故障涉及 manifest.yml 解析。完成的标准是 Error 对象能够暴露 test_mode_info 的其他详细信息，而不再需要 cloud controller 日志。

When an ClientV3Exception is thrown there is more details available in the message than exposed through the Error object. Specifically it would be useful to get the content test_mode_info which had additional details which in this case was bad YAML provided in the manifest.yml. The only way to get these details currently is to search through the cloud controller logs but I assume they come back in the JSON payload that the cf java client could sift through and provide on the Error class.

{"timestamp":"2021-04-07T21:00:41.467072221Z","message":"Request failed: 500: {\"errors\"=>[{\"title\"=>\"UnknownError\", \"detail\"=>\"An unknown error occurred.\", \"code\"=>10001, \"test_mode_info\"=>{\"detail\"=>\"(<unknown>): found unexpected ':' while scanning a plain scalar at line 7 column 16\", \"title\"=>\"CF-SyntaxError\", \"backtrace\"=>[\"/var/vcap/data/packages/ruby-2.5.5-r0.10.0/44147f64f025dd1617cd2c22884c29898f502057/lib/ruby/2.5.0/psych.rb:402:in `parse'\", \"/var/vcap/data/packages/ruby-2.5.5-r0.10.0/44147f64f025dd1617cd2c22884c29898f502057/lib/ruby/2.5.0/psych.rb:402:in `parse_stream'\", \"/var/vcap/data/packages/ruby-2.5.5-r0.10.0/44147f64f025dd1617cd2c22884c29898f502057/lib/ruby/2.5.0/psych.rb:350:in `parse'\", \"/var/vcap/data/packages/ruby-2.5.5-r0.10.0/44147f64f025dd1617cd2c22884c29898f502057/lib/ruby/2.5.0/psych.rb:314:in `safe_load'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/cloud_controller_ng/app/controllers/v3/application_controller.rb:91:in `parsed_yaml'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/cloud_controller_ng/app/controllers/v3/app_manifests_controller.rb:82:in `parsed_app_manifest_params'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/cloud_controller_ng/app/controllers/v3/app_manifests_controller.rb:13:in `apply_manifest'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/abstract_controller/base.rb:194:in `process_action'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_controller/metal/rendering.rb:30:in `process_action'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/abstract_controller/callbacks.rb:42:in `block in process_action'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/activesupport-5.2.4.3/lib/active_support/callbacks.rb:132:in `run_callbacks'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/abstract_controller/callbacks.rb:41:in `process_action'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_controller/metal/rescue.rb:22:in `process_action'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/activesupport-5.2.4.3/lib/active_support/notifications.rb:168:in `block in instrument'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/activesupport-5.2.4.3/lib/active_support/notifications/instrumenter.rb:23:in `instrument'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/activesupport-5.2.4.3/lib/active_support/notifications.rb:168:in `instrument'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_controller/metal/instrumentation.rb:32:in `process_action'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_controller/metal/params_wrapper.rb:256:in `process_action'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/abstract_controller/base.rb:134:in `process'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionview-5.2.4.3/lib/action_view/rendering.rb:32:in `process'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_controller/metal.rb:191:in `dispatch'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_controller/metal.rb:252:in `dispatch'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/routing/route_set.rb:52:in `dispatch'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/routing/route_set.rb:34:in `serve'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/journey/router.rb:52:in `block in serve'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/journey/router.rb:35:in `each'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/journey/router.rb:35:in `serve'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/routing/route_set.rb:840:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/rack-2.2.2/lib/rack/tempfile_reaper.rb:15:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/http/content_security_policy.rb:18:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/activesupport-5.2.4.3/lib/active_support/callbacks.rb:98:in `run_callbacks'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/middleware/callbacks.rb:26:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/middleware/debug_exceptions.rb:61:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/rack-2.2.2/lib/rack/runtime.rb:22:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/activesupport-5.2.4.3/lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/actionpack-5.2.4.3/lib/action_dispatch/middleware/executor.rb:14:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/rack-2.2.2/lib/rack/sendfile.rb:110:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/rack-2.2.2/lib/rack/urlmap.rb:74:in `block in call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/rack-2.2.2/lib/rack/urlmap.rb:58:in `each'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/rack-2.2.2/lib/rack/urlmap.rb:58:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/cloud_controller_ng/middleware/cef_logs.rb:18:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/cloud_controller_ng/middleware/request_logs.rb:38:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/cloud_controller_ng/middleware/security_context_setter.rb:19:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/cloud_controller_ng/middleware/vcap_request_id.rb:15:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/cloud_controller_ng/middleware/cors.rb:49:in `call_app'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/cloud_controller_ng/middleware/cors.rb:14:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/cloud_controller_ng/middleware/request_metrics.rb:12:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/rack-2.2.2/lib/rack/builder.rb:244:in `call'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/thin-1.7.2/lib/thin/connection.rb:86:in `block in pre_process'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/thin-1.7.2/lib/thin/connection.rb:84:in `catch'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/thin-1.7.2/lib/thin/connection.rb:84:in `pre_process'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/thin-1.7.2/lib/thin/connection.rb:50:in `block in process'\", \"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/gem_home/ruby/2.5.0/gems/eventmachine-1.0.9.1/lib/eventmachine.rb:1067:in `block in spawn_threadpool'\"]}}]}","log_level":"error","source":"cc.api","data":{"request_guid":"9ac4d7d8-6cc3-4398-7507-8745c1f4e7be::845e6902-6be0-427b-84ec-133aa14dc326"},"thread_id":47033084351880,"fiber_id":47033056325400,"process_id":7,"file":"/var/vcap/data/packages/cloud_controller_ng/38edb9da90769220ec24e4ae4ef8d6a0881ca7b6/cloud_controller_ng/app/controllers/v3/errors_controller.rb","lineno":11,"method":"internal_error"}