[IGNITE-11486] Support Automatic modules for ignite-zookeeper: Migrate to log4j2 to resolve issues with logging packages conflict

• Type: Sub-task
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Ignite Flags: Docs Required
• Assignee: Unassigned
• Reporter: Dmitry Pavlov
• Created: 05/Mar/19 15:10
• Updated: 03/Aug/22 16:30

Description

Usage of Ignite Zookeeper module in a modular environment failed

error: the unnamed module reads package org.apache.log4j from both slf4j.log4j12 and log4j

slf4j version is updated by the build system when Ignite Zookeeper is used.

+--- org.slf4j:slf4j-api:1.7.7 -> 1.7.25
    +--- org.slf4j:slf4j-log4j12:1.7.7 -> 1.7.25
          +--- org.slf4j:slf4j-api:1.7.25
          \--- log4j:log4j:1.2.17

Probably we should update whole Ignite dependency for Slf4j

Following combination seems to be compilable in a modular environment

    compile (group: 'org.apache.ignite', name: 'ignite-zookeeper', version: ignVer) {
        exclude group: "org.slf4j", module: "slf4j-log4j12"
        exclude group: "log4j", module: "log4j"
    }

    compile group: "org.slf4j", name: "slf4j-api", version: "1.7.25"
    compile group: "org.apache.logging.log4j", name: "log4j-slf4j-impl", version: "2.11.2"

According to https://www.slf4j.org/news.html only 1.8x version is modularized, but this major versions line contains only betas. See also https://logging.apache.org/log4j/2.0/log4j-slf4j-impl/

See also https://blogs.apache.org/logging/entry/moving_on_to_log4j_2

Migration quide https://logging.apache.org/log4j/2.x/manual/migration.html

Issue Links

• is related to: IGNITE-16650 Exclude ignite-log4j, log4j 1.2.17