h1, sorry my eng bad. Why do I need to http://192.168.91.133:9090/nxlog-manager when specifying the login "admin" and the password "nxlog123", I get the error " could not contact the database server."

OS: CentOS Linux release 8.4.2105

DB: usr/libexec/mysqld Ver 8.0.21 for Linux on x86_64 (Source distribution)

my.cnf -> [client] password=asdf Password "asdf" install mysql root user

./dbinit.sh - Done

in /etc/hosts -> 192.168.91.133 localhost.localdomain

[root@localhost db_init]# systemctl status mysqld.service ● mysqld.service - MySQL 8.0 database server Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled) Active: active (running) since Wed 2021-09-22 15:59:27 MSK; 9min ago Process: 4119 ExecStopPost=/usr/libexec/mysql-wait-stop (code=exited, status=0/SUCCESS) Process: 4277 ExecStartPost=/usr/libexec/mysql-check-upgrade (code=exited, status=0/SUCCESS) Process: 4196 ExecStartPre=/usr/libexec/mysql-prepare-db-dir mysqld.service (code=exited, status=0/SUCCESS) Process: 4171 ExecStartPre=/usr/libexec/mysql-check-socket (code=exited, status=0/SUCCESS) Main PID: 4233 (mysqld) Status: "Server is operational" Tasks: 42 (limit: 49168) Memory: 352.8M CGroup: /system.slice/mysqld.service └─4233 /usr/libexec/mysqld --basedir=/usr

сен 22 15:59:27 localhost.localdomain systemd[1]: Starting MySQL 8.0 database server... сен 22 15:59:27 localhost.localdomain systemd[1]: Started MySQL 8.0 database server.

[root@localhost db_init]# service nxlog-manager status ● nxlog-manager.service - NXLog Manager Loaded: loaded (/usr/lib/systemd/system/nxlog-manager.service; enabled; vendor preset: disabled) Active: active (running) since Wed 2021-09-22 15:58:28 MSK; 11min ago Main PID: 4013 (java) Tasks: 53 (limit: 49168) Memory: 1.5G CGroup: /system.slice/nxlog-manager.service └─4013 /usr/bin/java -Xms1g -Xmx2g -XX:PermSize=64m -XX:MaxPermSize=256m -Xss2m -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -Dorg.apache.commons.collections.enableUnsa>

Sep 22 16:00:13 localhost.localdomain service.sh[4013]: сен 22, 2021 4:00:13 PM org.apache.jasper.compiler.JDTJavaCompiler setSourceVM Sep 22 16:00:13 localhost.localdomain service.sh[4013]: WARNING: Unknown source VM 1.7 ignored. Sep 22 16:00:14 localhost.localdomain service.sh[4013]: сен 22, 2021 4:00:14 PM org.apache.jasper.compiler.JDTJavaCompiler setTargetVM Sep 22 16:00:14 localhost.localdomain service.sh[4013]: WARNING: Unknown target VM 1.7 ignored.

nxlog-manager.log

2021-09-22 16:23:28,589 WARN localhost.localdomain unknown [com.mchange.v2.resourcepool.BasicResourcePool] - com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@487eb16 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
java.sql.SQLException: Unknown system variable 'tx_isolation' at org.mariadb.jdbc.internal.SQLExceptionMapper.get(SQLExceptionMapper.java:149) at org.mariadb.jdbc.internal.SQLExceptionMapper.throwException(SQLExceptionMapper.java:106) at org.mariadb.jdbc.MySQLStatement.executeQueryEpilog(MySQLStatement.java:268) at org.mariadb.jdbc.MySQLStatement.execute(MySQLStatement.java:296) at org.mariadb.jdbc.MySQLStatement.executeQuery(MySQLStatement.java:349) at org.mariadb.jdbc.MySQLStatement.executeQuery(MySQLStatement.java:408) at org.mariadb.jdbc.MySQLConnection.getTransactionIsolation(MySQLConnection.java:410) at com.mchange.v2.c3p0.impl.NewPooledConnection.<init>(NewPooledConnection.java:120) at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:240) at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206) at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203) at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138) at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125) at com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44) at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870) at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696) Caused by: org.mariadb.jdbc.internal.common.QueryException: Unknown system variable 'tx_isolation' at org.mariadb.jdbc.internal.mysql.MySQLProtocol.getResult(MySQLProtocol.java:995) at org.mariadb.jdbc.internal.mysql.MySQLProtocol.executeQuery(MySQLProtocol.java:1050) at org.mariadb.jdbc.internal.mysql.MySQLProtocol.executeQuery(MySQLProtocol.java:1030) at org.mariadb.jdbc.MySQLStatement.execute(MySQLStatement.java:289) ... 12 more