Multiple Tasks attempts FAILED: Timed out after 600 secs.   I'm running an Oracle loader app, that do 'Select * from hive_table', in Yarn and loads the data in Oracle. It run only map tasks and it finish sucessfully, but when you look at the details, it is clear that 5 of the 48 maps, have been failed because of the Timed out in the attempt. I noticed that only the last tasks got timed out and after the 10 min they run sucessfull. What is the cause of this? I try to increase/decrease the mapreduce.task.timeout parameter with no luck - it still happening.    job_1509368122489_0453 Attempt Type Failed Killed Successful Maps Reduces 5 0 48 0 0 0   Can you please tell me whats wrong? Thanks.   mapred-site: <?xml version="1.0" encoding="UTF-8"?> <!--Autogenerated by Cloudera Manager--> <configuration> <property> <name>mapreduce.job.split.metainfo.maxsize</name> <value>10000000</value> </property> <property> <name>mapreduce.job.counters.max</name> <value>120</value> </property> <property> <name>mapreduce.output.fileoutputformat.compress</name> <value>false</value> </property> <property> <name>mapreduce.output.fileoutputformat.compress.type</name> <value>BLOCK</value> </property> <property> <name>mapreduce.output.fileoutputformat.compress.codec</name> <value>org.apache.hadoop.io.compress.DefaultCodec</value> </property> <property> <name>mapreduce.map.output.compress.codec</name> <value>org.apache.hadoop.io.compress.SnappyCodec</value> </property> <property> <name>mapreduce.map.output.compress</name> <value>true</value> </property> <property> <name>zlib.compress.level</name> <value>DEFAULT_COMPRESSION</value> </property> <property> <name>mapreduce.task.io.sort.factor</name> <value>64</value> </property> <property> <name>mapreduce.map.sort.spill.percent</name> <value>0.8</value> </property> <property> <name>mapreduce.reduce.shuffle.parallelcopies</name> <value>14</value> </property> <property> <name>mapreduce.task.timeout</name> <value>600000</value> </property> <property> <name>mapreduce.client.submit.file.replication</name> <value>2</value> </property> <property> <name>mapreduce.job.maps</name> <value>48</value> </property> <property> <name>mapreduce.job.reduces</name> <value>96</value> </property> <property> <name>mapreduce.task.io.sort.mb</name> <value>256</value> </property> <property> <name>mapreduce.map.speculative</name> <value>true</value> </property> <property> <name>mapreduce.reduce.speculative</name> <value>true</value> </property> <property> <name>mapreduce.job.reduce.slowstart.completedmaps</name> <value>0.8</value> </property> <property> <name>mapreduce.jobhistory.address</name> <value>hadoop-nn:10020</value> </property> <property> <name>mapreduce.jobhistory.webapp.address</name> <value>hadoop-nn:19888</value> </property> <property> <name>mapreduce.jobhistory.webapp.https.address</name> <value>hadoop-nn:19890</value> </property> <property> <name>mapreduce.jobhistory.admin.address</name> <value>hadoop-nn:10033</value> </property> <property> <name>mapreduce.framework.name</name> <value>yarn</value> </property> <property> <name>yarn.app.mapreduce.am.staging-dir</name> <value>/user</value> </property> <property> <name>yarn.app.mapreduce.am.resource.mb</name> <value>1024</value> </property> <property> <name>yarn.app.mapreduce.am.resource.cpu-vcores</name> <value>1</value> </property> <property> <name>mapreduce.job.ubertask.enable</name> <value>false</value> </property> <property> <name>yarn.app.mapreduce.am.command-opts</name> <value>-Djava.net.preferIPv4Stack=true -Xmx825955249</value> </property> <property> <name>mapreduce.map.java.opts</name> <value>-Djava.net.preferIPv4Stack=true -Xmx825955249</value> </property> <property> <name>mapreduce.reduce.java.opts</name> <value>-Djava.net.preferIPv4Stack=true -Xmx825955249</value> </property> <property> <name>yarn.app.mapreduce.am.admin.user.env</name> <value>LD_LIBRARY_PATH=$HADOOP_COMMON_HOME/lib/native:$JAVA_LIBRARY_PATH</value> </property> <property> <name>mapreduce.map.memory.mb</name> <value>1024</value> </property> <property> <name>mapreduce.map.cpu.vcores</name> <value>1</value> </property> <property> <name>mapreduce.reduce.memory.mb</name> <value>1024</value> </property> <property> <name>mapreduce.reduce.cpu.vcores</name> <value>1</value> </property> <property> <name>mapreduce.application.classpath</name> <value>$HADOOP_MAPRED_HOME/*,$HADOOP_MAPRED_HOME/lib/*,$MR2_CLASSPATH</value> </property> <property> <name>mapreduce.admin.user.env</name> <value>LD_LIBRARY_PATH=$HADOOP_COMMON_HOME/lib/native:$JAVA_LIBRARY_PATH</value> </property> <property> <name>mapreduce.shuffle.max.connections</name> <value>80</value> </property> </configuration> ... View more