& | ^ >> << 位运算 所谓的位运算都是对二进制的操作 &,如果是两个大家很熟悉, "&&"是"与",一个也是 不过是两个二进制码的"与" , 两个都是"1" 才会得"1"
ElasticsearchParseException[malformed, expected settings to start with 'object', instead was [VALUE_STRING]]; [Failed to load settings from [elasticsearch.yml]]; nested: ScannerException[while scanning a simple key Failed to load settings from [elasticsearch.yml]]; nested: ElasticsearchParseException[malformed, expected end of settings but encountered additional content starting at line number
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