Red Hat Single Sign-On 集群节点允许引导并发。当 Red Hat Single Sign-On 服务器实例引导时，可能需要进行一些数据库迁移、导入或首次初始化。DB 锁定用于防止在集群节点同时引导时与另一个操作冲突。
默认情况下，这个锁定的最大超时时间为 900 秒。如果节点正在等待这个锁定超过超时时间，它将无法引导。通常，您不需要增加/减少默认值，但仅在您的发行版中的 standalone. xml、standalone -ha.xml 或 domain.xml 文件中配置它。此文件的位置取决于您的 操作模式。
<spi name="dblock">
<provider name="jpa" enabled="true">
<properties>
<property name="lockWaitTimeout" value="900"/>
</properties>
</provider>
</spi>
<spi name="dblock">
<provider name="jpa" enabled="true">
<properties>
<property name="lockWaitTimeout" value="900"/>
</properties>
</provider>
</spi>
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