Ejabberd 无法连接到“localhost”：3306：错误，“连接失败：连接被拒绝”

Posted 2023-03-15

【中文标题】Ejabberd 无法连接到“localhost”：3306：错误，“连接失败：连接被拒绝”

【英文标题】：Ejabberd Failed connecting to "localhost":3306 : error,"connect failed: connection refused"Ejabberd 无法连接到“localhost”：3306：错误，“连接失败：连接被拒绝”

【发布时间】：2020-03-25 20:44:03

【问题描述】：

我正在尝试使用mysql 设置ejabberd。每次都是localhost:3306: connection refused error。有什么解决办法吗？

环境

ejabberd version: 19.09
OS: Linux (Debian)
Installed from: source

mysql的配置部分

auth_method: sql
default_db: sql
sql_type: mysql
sql_server: "localhost"
sql_database: "ejabberd"
sql_username: "ejabberd"
sql_password: "ejabberd"
sql_port: 3306

错误日志

2019-11-30 22:44:49.117 [error] <0.449.0>@ejabberd_sql:log:1043 p1_mysql_recv: Failed connecting to localhost:3306: connection refused
2019-11-30 22:44:49.117 [error] <0.450.0>@ejabberd_sql:log:1043 p1_mysql_recv: Failed connecting to localhost:3306: connection refused
2019-11-30 22:44:49.117 [error] <0.431.0>@ejabberd_sql:log:1043 p1_mysql_conn: Failed connecting to "localhost":3306 : error,"connect failed: connection refused"
2019-11-30 22:44:49.117 [error] <0.432.0>@ejabberd_sql:log:1043 p1_mysql_conn: Failed connecting to "localhost":3306 : error,"connect failed: connection refused"
2019-11-30 22:44:49.117 [error] <0.433.0>@ejabberd_sql:log:1043 p1_mysql_conn: Failed connecting to "localhost":3306 : error,"connect failed: connection refused"
2019-11-30 22:44:49.117 [error] <0.434.0>@ejabberd_sql:log:1043 p1_mysql_conn: Failed connecting to "localhost":3306 : error,"connect failed: connection refused"
2019-11-30 22:44:49.117 [error] <0.435.0>@ejabberd_sql:log:1043 p1_mysql_conn: Failed connecting to "localhost":3306 : error,"connect failed: connection refused"
2019-11-30 22:44:49.117 [error] <0.436.0>@ejabberd_sql:log:1043 p1_mysql_conn: Failed connecting to "localhost":3306 : error,"connect failed: connection refused"
2019-11-30 22:44:49.117 [error] <0.437.0>@ejabberd_sql:log:1043 p1_mysql_conn: Failed connecting to "localhost":3306 : error,"connect failed: connection refused"
2019-11-30 22:44:49.117 [error] <0.438.0>@ejabberd_sql:log:1043 p1_mysql_conn: Failed connecting to "localhost":3306 : error,"connect failed: connection refused"
2019-11-30 22:44:49.117 [error] <0.439.0>@ejabberd_sql:log:1043 p1_mysql_conn: Failed connecting to "localhost":3306 : error,"connect failed: connection refused"
2019-11-30 22:44:49.117 [error] <0.440.0>@ejabberd_sql:log:1043 p1_mysql_conn: Failed connecting to "localhost":3306 : error,"connect failed: connection refused"
2019-11-30 22:44:49.117 [error] <0.421.0>@ejabberd_sql:log:1043 p1_mysql_conn: post_start error connect_failed
2019-11-30 22:44:49.117 [error] <0.427.0>@ejabberd_sql:log:1043 p1_mysql_conn: post_start error connect_failed

error.log/crash.log 中的错误

2019-11-30 22:36:58 =CRASH REPORT====
crasher:
initial call: mod_mqtt:init/1
pid: <0.525.0>
registered_name: []
exception exit: db_failure,[gen_server,init_it,6,[file,"gen_server.erl",line,349],proc_lib,init_p_do_apply,3,[file,"proc_lib.erl",line,247]]
ancestors: [ejabberd_gen_mod_sup,ejabberd_sup,<0.88.0>]
message_queue_len: 0
messages: []
links: [<0.403.0>]
dictionary: []
trap_exit: false
status: running
heap_size: 987
stack_size: 27
reductions: 1073
neighbours:

【问题讨论】：

你安装了 MySQL 服务器吗？它的日志是怎么说的？

是的，我已经安装了mysql

我看到 mysql 日志连接正在连接到 MySQL，但它不允许。它看起来是最大包大小问题。

错误信息是什么？

Mysql 日志说Error Reading Communication Packets。我想将max_allowed_packet 调整为更大的尺寸

【参考方案1】：

可能连接随机丢失 可能无法访问 试试下面的mysql -u ejabberd -h localhost -p password

【参考方案2】：

问题来自mysql。我在mysql log 文件中找到了它。我将max_allowed_packet 增加到更大的尺寸，然后增加了RAM，一切都很好。