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workers ワーカーの作成時に、worker can't resolve tomcat address エラーが発生する

Solution Verified - Updated -

Issue

  • mod_jk で Apache を起動すると、mod_jk のログに以下のエラーが出力されます。
[error] ajp_validate::jk_ajp_common.c (2526): worker node1 can't resolve tomcat address node1.example.com
[error] wc_create_worker::jk_worker.c (163): validate failed for node1
[error] validate::jk_lb_worker.c (1599): Failed creating worker node1
  • tomcat インスタンスがすべて失敗し、正常な状態に戻るためのワーカーがありません。マシンを再起動すると、以下のような mod_jk error エラーが Apache httpd ログに出力されます。
[error] ajp_validate::jk_ajp_common.c (2748): worker node1 can't resolve tomcat address node1.example.com
[error] ajp_validate::jk_ajp_common.c (2748): worker node2 can't resolve tomcat address node2.example.com
[info] init_jk::mod_jk.c (3383): mod_jk/1.2.40 initialized
[info] service::jk_lb_worker.c (1579): All tomcat instances failed, no more workers left for recovery (attempt=0, retry=0)

Environment

  • Red Hat JBoss Enterprise Web Server (EWS)
  • mod_jk

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