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在某些场景下,org.apache.spark.util.ClosureCleaner#getClassReader会导致短暂几百毫秒延迟 #97

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hn5092 opened this issue Jan 7, 2020 · 0 comments
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在某些场景下,org.apache.spark.util.ClosureCleaner#getClassReader会导致短暂几百毫秒延迟 #97

hn5092 opened this issue Jan 7, 2020 · 0 comments
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hn5092 commented Jan 7, 2020 •
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org.apache.spark.util.ClosureCleaner#getClassReader这个操作会从classloader里面获取class的二进制文件,有io操作,如果遇到一个sql很长,这里则会进行很多次调用, 每次大概500ms,会导致其查询时间变长
@hn5092 hn5092 self-assigned this Jan 7, 2020
hn5092 added a commit that referenced this issue Jan 13, 2020
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#97 add class bytes cache to org.apache.spark.util.ClosureCleaner#get…
e68b34b 
…ClassReader
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