Hi all, we are experiencing a progressive socket leak from the LLAP HiveServer2 daemon to HDFS DataNodes in a cluster running HDP 3.1.5 The fd grow constantly until the limit of 6400 and the only resolution is to restart hiveserver2Interactive: [hive@myhost hive]$ netstat -tanp | grep "CLOSE_WAIT" | awk '{print $NF}' | awk -F'/' '{print $1}' | sort | uniq -c (Not all processes could be identified, non-owned process info will not be shown, you would have to be root to see it all.) 1734 - 55443 2791 5 49167 [hive@myhost hive]$ ps -ef | grep 2791 hive 2791 1 31 Apr11 ? 6-01:44:32 /usr/jdk64/jdk1.8.0_112/bin/java -Dproc_jar -Dhdp.version=3.1.5.0-152 -Djava.net.preferIPv4Stack=true -Xloggc:/var/log/hive/hiveserverinteractive-gc-%t.log -XX:+UseG1GC -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCCause -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=100M -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/grid/0/tmp/hsi_heapdump.hprof -Dhive.log.dir=/var/log/hive -Dhive.log.file=hiveserver2Interactive.log -Dzookeeper.sasl.client.username=zookeeper -Dhdp.version=3.1.5.0-152 -Xmx4096m -Dproc_hiveserver2 -Xmx10240m -Dlog4j.configurationFile=hive-log4j2.properties -Djava.util.logging.config.file=/usr/hdp/current/hive-server2/conf_llap//parquet-logging.properties -Dyarn.log.dir=/var/log/hadoop/hive -Dyarn.log.file=hadoop.log -Dyarn.home.dir=/usr/hdp/3.1.5.0-152/hadoop-yarn -Dyarn.root.logger=INFO,console -Djava.library.path=:/usr/hdp/current/hadoop-client/lib/native/Linux-amd64-64:/usr/hdp/3.1.5.0-152/hadoop/lib/native/Linux-amd64-64:/usr/hdp/current/hadoop-client/lib/native -Dhadoop.log.dir=/var/log/hadoop/hive -Dhadoop.log.file=hadoop.log -Dhadoop.home.dir=/usr/hdp/current/hadoop-client -Dhadoop.id.str=hive -Dhadoop.root.logger=INFO,console -Dhadoop.policy.file=hadoop-policy.xml -Dhadoop.security.logger=INFO,NullAppender org.apache.hadoop.util.RunJar /usr/hdp/3.1.5.0-152/hive/lib/hive-service-3.1.0.3.1.5.0-152.jar org.apache.hive.service.server.HiveServer2 --hiveconf hive.aux.jars.path=file:///usr/hdp/current/hive-server2/lib/hive-hcatalog-core.jar,file:--and other jar-- All connections originate from LLAP and target specific datanodes: 18302 ip1 1019 18441 ip2 1019 18708 ip3 1019 Initially, we suspected the issue could be caused by some UDF, especially those that interact with HDFS (e.g. spatial or crypto functions). We tested queries that force loading of JARs like but at the moment we were unable to reproduce the socket leak in our test cluster, even when using the same UDFs and query patterns. Environment: HDP version: 3.1.5 Hive: 3.1.0 JDK: 1.8.0_112 Any suggestion? Thanks. ... View more