[ https://issues.apache.org/jira/browse/IMPALA-7668?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
bharath v resolved IMPALA-7668. ------------------------------- Resolution: Fixed > close() URLClassLoaders after usage. > ------------------------------------ > > Key: IMPALA-7668 > URL: https://issues.apache.org/jira/browse/IMPALA-7668 > Project: IMPALA > Issue Type: Bug > Components: Frontend > Affects Versions: Impala 2.12.0, Impala 3.1.0 > Reporter: bharath v > Assignee: bharath v > Priority: Major > Fix For: Impala 3.1.0 > > > There are a few places in the code that uses URLClassLoaders to load some > java classes at runtime. One example is when loading Java UDFs at startup. > {code:java} > public static List<Function> extractFunctions(String db, > ........... > URL[] classLoaderUrls = new URL[] {new URL(localJarPath.toString())}; > URLClassLoader urlClassLoader = new URLClassLoader(classLoaderUrls); > {code} > Starting JDK7, URLClassloader lets the caller close all the closeables opened > by it, avoiding bugs like FD leaks etc. > https://docs.oracle.com/javase/7/docs/api/java/net/URLClassLoader.html#close() > We have seen issues like lingering FDs from this code using certain versions > of JDKs where the FDs of temporary jars (copied to /tmp) by this code are not > closed and hence their space from disk is not claimed causing disk space > issues. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org