Wolkenkit fails to start with "Error: Failed to get lowest processed position."

Question

我目前正在按照 tutorial to create a chat application.

调查 Wolkenkit

写完代码后我运行sudo yarn wolkenkit start。这给了我以下错误信息：

Waiting for https://localhost:3000/ to reply...
(node:11226) Warning: Setting the NODE_TLS_REJECT_UNAUTHORIZED environment variable to '0' makes TLS connections and HTTPS requests insecure by disabling certificate verification.
Error: Failed to get lowest processed position.
  at EventSequencer.getLowestProcessedPosition (/wolkenkit/eventSequencer/EventSequencer.js:71:13)
  at /wolkenkit/app.js:63:41
  at process._tickCallback (internal/process/next_tick.js:68:7)

Application code caused runtime error.
✗ Failed to start the application.

略高于命令警告的错误：

▻ Application certificate is self-signed.

对于如何解决此问题并在我的本地计算机上将演示应用程序安装到运行，我将不胜感激。

我的开发机器是运行ning Debian GNU/Linux 10 with

节点 13.8.0
纱线 1.21.1
Docker 18.09.1
Wolkenkit 3.1.2

由于这些警告，我怀疑这可能与用于 TLS 的 X.509 证书有关。我使用 openssl 创建它，如下所示：

$ openssl req -new -sha256 -nodes -out localhost.csr -newkey rsa:2048 -keyout localhost.key -config <(
cat <<-EOF
[req]
default_bits = 2048
prompt = no
default_md = sha256
req_extensions = req_ext
distinguished_name = dn

[ dn ]
C=US
ST=New York
L=Rochester
O=Somthing
OU=Something Else
emailAddress=test@example.com
CN = localhost

[ req_ext ]
subjectAltName = @alt_names

[ alt_names ]
DNS.1 = localhost
EOF
)


$ openssl x509 -req -days 365 -in localhost.csr -signkey localhost.key -sha256 -out localhost.crt

然后我将 localhost.crt 和 localhost.key 移动到以下结构中：

server/keys/localhost
├── certificate.pem
└── privateKey.pem

并像这样设置 package.json：

{
    "name": "chat",
    "version": "0.0.0",
    "wolkenkit": {
        "application": "chat",
        "runtime": {
            "version": "3.1.0"
        },
        "environments": {
            "default": {
                "api": {
                    "address": {
                        "host": "localhost",
                        "port": 3000
                    },
                    "certificate": "/server/keys/localhost",
                    "allowAccessFrom": "*"
                },
                "fileStorage": {
                    "allowAccessFrom": "*"
                },
                "node": {
                    "environment": "development"
                }
            }
        }
    },
    "dependencies": {
        "wolkenkit": "^3.1.2"
    }
}

Answer 1

这似乎与 here in this Github issue 中描述的问题相同。

The problem is that due to a change in the start command, we now assume that there must be a read model (which has not yet been defined, if you follow the guide).

If you simply ignore this error, and follow on, the next thing is to define the read model. Once you have done that, you can successfully run wolkenkit start.

Wolkenkit fails to start with "Error: Failed to get lowest processed position."

Wolkenkit fails to start with "Error: Failed to get lowest processed position."

node.js

wolkenkit