我正在尝试在Ubuntu 16.04上启动Hyperledger Sawtooth网络。我正在按照https://sawtooth.hyperledger.org/docs/core/releases/latest/app_developers_guide/ubuntu.html的说明进行操作。
启动验证服务可以正常运行，但是无法启动devmode共识引擎。发生了以下情况：
mdi@boromir:~$ sudo -u sawtooth devmode-engine-rust -vv --connect tcp://localhost:5050
ERROR | devmode_engine_rust: | ReceiveError: TimeoutError
DEBUG | sawtooth_sdk::messag | Disconnected outbound channel
DEBUG | sawtooth_sdk::messag | Exited stream
DEBUG | zmq:547 | socket dropped
DEBUG | zmq:547 | socket dropped
DEBUG | zmq:454 | context dropped
mdi@boromir:~$
验证服务正在运行，如下所示：
mdi@boromir:~$ sudo -u sawtooth sawtooth-validator -vv
[sudo] password for mdi:
[2019-03-07 16:40:15.601 WARNING (unknown file)] [src/pylogger.rs: 40] Started logger at level DEBUG
[2019-03-07 16:40:15.919 DEBUG ffi] loading library libsawtooth_validator.so
[2019-03-07 16:40:15.926 DEBUG ffi] loading library libsawtooth_validator.so
[2019-03-07 16:40:16.299 INFO path] Skipping path loading from non-existent config file: /etc/sawtooth/path.toml
[2019-03-07 16:40:16.299 INFO validator] Skipping validator config loading from non-existent config file: /etc/sawtooth/validator.toml
[2019-03-07 16:40:16.300 INFO keys] Loading signing key: /etc/sawtooth/keys/validator.priv
[2019-03-07 16:40:16.306 INFO cli] sawtooth-validator (Hyperledger Sawtooth) version 1.1.4
[2019-03-07 16:40:16.307 INFO cli] config [path]: config_dir = "/etc/sawtooth"; config [path]: key_dir = "/etc/sawtooth/keys"; config [path]: data_dir = "/var/lib/sawtooth"; config [path]: log_dir = "/var/log/sawtooth"; config [path]: policy_dir = "/etc/sawtooth/policy"
[2019-03-07 16:40:16.307 WARNING cli] Network key pair is not configured, Network communications between validators will not be authenticated or encrypted.
[2019-03-07 16:40:16.333 DEBUG state_verifier] verifying state in /var/lib/sawtooth/merkle-00.lmdb
[2019-03-07 16:40:16.337 DEBUG state_verifier] block store file is /var/lib/sawtooth/block-00.lmdb
[2019-03-07 16:40:16.338 INFO state_verifier] Skipping state verification: chain head's state root is present
[2019-03-07 16:40:16.339 INFO cli] Starting validator with serial scheduler
[2019-03-07 16:40:16.339 DEBUG core] global state database file is /var/lib/sawtooth/merkle-00.lmdb
[2019-03-07 16:40:16.340 DEBUG core] txn receipt store file is /var/lib/sawtooth/txn_receipts-00.lmdb
[2019-03-07 16:40:16.341 DEBUG core] block store file is /var/lib/sawtooth/block-00.lmdb
[2019-03-07 16:40:16.342 DEBUG threadpool] Creating thread pool executor Component
[2019-03-07 16:40:16.343 DEBUG threadpool] Creating thread pool executor Network
[2019-03-07 16:40:16.343 DEBUG threadpool] Creating thread pool executor Client
[2019-03-07 16:40:16.343 DEBUG threadpool] Creating thread pool executor Signature
[2019-03-07 16:40:16.345 DEBUG threadpool] Creating thread pool executor FutureCallback
[2019-03-07 16:40:16.346 DEBUG threadpool] Creating thread pool executor FutureCallback
[2019-03-07 16:40:16.352 DEBUG threadpool] Creating thread pool executor Executing
[2019-03-07 16:40:16.353 DEBUG threadpool] Creating thread pool executor Consensus
[2019-03-07 16:40:16.353 DEBUG threadpool] Creating thread pool executor FutureCallback
[2019-03-07 16:40:16.358 DEBUG threadpool] Creating thread pool executor Instrumented
[2019-03-07 16:40:16.368 DEBUG selector_events] Using selector: ZMQSelector
[2019-03-07 16:40:16.376 INFO interconnect] Listening on tcp://127.0.0.1:4004
[2019-03-07 16:40:16.377 DEBUG dispatch] Added send_message function for connection ServerThread
[2019-03-07 16:40:16.377 DEBUG dispatch] Added send_last_message function for connection ServerThread
[2019-03-07 16:40:16.382 DEBUG genesis] genesis_batch_file: /var/lib/sawtooth/genesis.batch
[2019-03-07 16:40:16.384 DEBUG genesis] block_chain_id: not yet specified
[2019-03-07 16:40:16.384 INFO genesis] Producing genesis block from /var/lib/sawtooth/genesis.batch
[2019-03-07 16:40:16.385 DEBUG genesis] Adding 1 batches
此输出的时间是17:29，因此几乎一个小时都没有附加输出。
我试图查看锯齿设置：
mdi@boromir:~$ sawtooth settings list
Error: Unable to connect to "http://localhost:8008": make sure URL is correct
mdi@boromir:~$
然后我检查了哪些进程正在侦听哪些端口：
mdi@boromir:~$ netstat -plnt
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:4004 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -
tcp6 0 0 :::22 :::* LISTEN -
mdi@boromir:~$
有人知道验证程序服务是发起连接还是共识引擎？我的sawtooth settings list命令出了什么问题？有人知道如何使共识引擎正常工作吗？谢谢。
答案 0 :(得分：1)
我自己找到了答案。我有一台安装了Hyperledger Sawtooth的docker的机器。在该服务器上，验证程序日志的行为：
[2019-03-08 14:39:02.478 INFO interconnect] Listening on tcp://127.0.0.1:5050
如https://sawtooth.hyperledger.org/docs/core/releases/latest/app_developers_guide/ubuntu.html中所述，端口5050用于共识引擎。这清楚表明共识引擎会启动与验证程序服务的连接。
那么，为什么验证程序服务没有监听Ubuntu计算机上的端口5050？因为设置事务处理器从未在Ubuntu计算机上运行。我根据Ubuntu教程中的命令启动了该处理器：
sudo -u sawtooth settings-tp -v
然后，验证程序继续运行并开始侦听端口5050。因此，可以启动共识引擎。