如何修复docker容器中的以下Cassandara错误

Question

Picked up _JAVA_OPTIONS: -Xms128m -Xmx256m

[0.013s][warning][gc,ergo] NewSize was set larger than initial heap size, will use initial heap size.

[0.013s][warning][gc,ergo] MaxNewSize (409600k) is equal to or greater than the entire heap (262144k).  A new max generation size of 262080k will be used.

OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.

CMSRescanMultiple (32) must be less than or equal to ergonomic maximum (2) which is based on the maximum size of the old generation of the Java heap

CMSConcMarkMultiple (32) must be less than or equal to ergonomic maximum (2) which is based on the maximum size of the old generation of the Java heap

Error: Could not create the Java Virtual Machine.

Error: A fatal exception has occurred. Program will exit.

Picked up _JAVA_OPTIONS: -Xms128m -Xmx256m

OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.

[0.008s][warning][gc,ergo] NewSize was set larger than initial heap size, will use initial heap size.

[0.009s][warning][gc,ergo] MaxNewSize (409600k) is equal to or greater than the entire heap (262144k).  A new max generation size of 262080k will be used.

CMSRescanMultiple (32) must be less than or equal to ergonomic maximum (2) which is based on the maximum size of the old generation of the Java heap

CMSConcMarkMultiple (32) must be less than or equal to ergonomic maximum (2) which is based on the maximum size of the old generation of the Java heap

Error: Could not create the Java Virtual Machine.

Error: A fatal exception has occurred. Program will exit.

Answer 1

看起来你在使用Cassandra的自定义图像。如果您是Cassandra的新手，我们建议您遵循Apache Cassandra网站上的快速入门指南中的步骤，该指南将从Docker Hub中提取图像。

当只有256MB分配给堆时，将NewGen大小设置为400MB(409600k)是没有意义的。建议将min(-xms)和max(-xmx)堆设置为相同大小，以便在启动时预先分配最大值。同时将NewGen设置为最大堆的50%。

此外，不支持Java9。只有Java8支持Cassandra3.11或更早的版本。在Cassandra4.0中增加了对Java11的实验性支持，尽管我们希望尽快取消“实验性”标签，并使其正式用于4.0。其目的是为未来的Cassandra版本支持Java11+17 LTS。干杯！