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hive-default.xml.template
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hive-default.xml.template
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<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<configuration>
<!-- WARNING!!! This file is provided for documentation purposes ONLY! -->
<!-- WARNING!!! Any changes you make to this file will be ignored by Hive. -->
<!-- WARNING!!! You must make your changes in hive-site.xml instead. -->
<!-- Hive Execution Parameters -->
<property>
<name>mapred.reduce.tasks</name>
<value>-1</value>
<description>The default number of reduce tasks per job. Typically set
to a prime close to the number of available hosts. Ignored when
mapred.job.tracker is "local". Hadoop set this to 1 by default, whereas hive uses -1 as its default value.
By setting this property to -1, Hive will automatically figure out what should be the number of reducers.
</description>
</property>
<property>
<name>hive.exec.reducers.bytes.per.reducer</name>
<value>1000000000</value>
<description>size per reducer.The default is 1G, i.e if the input size is 10G, it will use 10 reducers.</description>
</property>
<property>
<name>hive.exec.reducers.max</name>
<value>999</value>
<description>max number of reducers will be used. If the one
specified in the configuration parameter mapred.reduce.tasks is
negative, hive will use this one as the max number of reducers when
automatically determine number of reducers.</description>
</property>
<property>
<name>hive.cli.print.header</name>
<value>false</value>
<description>Whether to print the names of the columns in query output.</description>
</property>
<property>
<name>hive.cli.print.current.db</name>
<value>false</value>
<description>Whether to include the current database in the hive prompt.</description>
</property>
<property>
<name>hive.exec.scratchdir</name>
<value>/tmp/hive-${user.name}</value>
<description>Scratch space for Hive jobs</description>
</property>
<property>
<name>hive.test.mode</name>
<value>false</value>
<description>whether hive is running in test mode. If yes, it turns on sampling and prefixes the output tablename</description>
</property>
<property>
<name>hive.test.mode.prefix</name>
<value>test_</value>
<description>if hive is running in test mode, prefixes the output table by this string</description>
</property>
<!-- If the input table is not bucketed, the denominator of the tablesample is determinied by the parameter below -->
<!-- For example, the following query: -->
<!-- INSERT OVERWRITE TABLE dest -->
<!-- SELECT col1 from src -->
<!-- would be converted to -->
<!-- INSERT OVERWRITE TABLE test_dest -->
<!-- SELECT col1 from src TABLESAMPLE (BUCKET 1 out of 32 on rand(1)) -->
<property>
<name>hive.test.mode.samplefreq</name>
<value>32</value>
<description>if hive is running in test mode and table is not bucketed, sampling frequency</description>
</property>
<property>
<name>hive.test.mode.nosamplelist</name>
<value></value>
<description>if hive is running in test mode, dont sample the above comma seperated list of tables</description>
</property>
<property>
<name>hive.metastore.local</name>
<value>true</value>
<description>controls whether to connect to remove metastore server or open a new metastore server in Hive Client JVM</description>
</property>
<property>
<name>javax.jdo.option.ConnectionURL</name>
<value>jdbc:derby:;databaseName=metastore_db;create=true</value>
<description>JDBC connect string for a JDBC metastore</description>
</property>
<property>
<name>javax.jdo.option.ConnectionDriverName</name>
<value>org.apache.derby.jdbc.EmbeddedDriver</value>
<description>Driver class name for a JDBC metastore</description>
</property>
<property>
<name>javax.jdo.PersistenceManagerFactoryClass</name>
<value>org.datanucleus.jdo.JDOPersistenceManagerFactory</value>
<description>class implementing the jdo persistence</description>
</property>
<property>
<name>javax.jdo.option.DetachAllOnCommit</name>
<value>true</value>
<description>detaches all objects from session so that they can be used after transaction is committed</description>
</property>
<property>
<name>javax.jdo.option.NonTransactionalRead</name>
<value>true</value>
<description>reads outside of transactions</description>
</property>
<property>
<name>javax.jdo.option.ConnectionUserName</name>
<value>APP</value>
<description>username to use against metastore database</description>
</property>
<property>
<name>javax.jdo.option.ConnectionPassword</name>
<value>mine</value>
<description>password to use against metastore database</description>
</property>
<property>
<name>javax.jdo.option.Multithreaded</name>
<value>true</value>
<description>Set this to true if multiple threads access metastore through JDO concurrently.</description>
</property>
<property>
<name>datanucleus.connectionPoolingType</name>
<value>DBCP</value>
<description>Uses a DBCP connection pool for JDBC metastore</description>
</property>
<property>
<name>datanucleus.validateTables</name>
<value>false</value>
<description>validates existing schema against code. turn this on if you want to verify existing schema </description>
</property>
<property>
<name>datanucleus.validateColumns</name>
<value>false</value>
<description>validates existing schema against code. turn this on if you want to verify existing schema </description>
</property>
<property>
<name>datanucleus.validateConstraints</name>
<value>false</value>
<description>validates existing schema against code. turn this on if you want to verify existing schema </description>
</property>
<property>
<name>datanucleus.storeManagerType</name>
<value>rdbms</value>
<description>metadata store type</description>
</property>
<property>
<name>datanucleus.autoCreateSchema</name>
<value>true</value>
<description>creates necessary schema on a startup if one doesn't exist. set this to false, after creating it once</description>
</property>
<property>
<name>datanucleus.autoStartMechanismMode</name>
<value>checked</value>
<description>throw exception if metadata tables are incorrect</description>
</property>
<property>
<name>datanucleus.transactionIsolation</name>
<value>read-committed</value>
<description>Default transaction isolation level for identity generation. </description>
</property>
<property>
<name>datanucleus.cache.level2</name>
<value>false</value>
<description>Use a level 2 cache. Turn this off if metadata is changed independently of hive metastore server</description>
</property>
<property>
<name>datanucleus.cache.level2.type</name>
<value>SOFT</value>
<description>SOFT=soft reference based cache, WEAK=weak reference based cache.</description>
</property>
<property>
<name>datanucleus.identifierFactory</name>
<value>datanucleus</value>
<description>Name of the identifier factory to use when generating table/column names etc. 'datanucleus' is used for backward compatibility</description>
</property>
<property>
<name>datanucleus.plugin.pluginRegistryBundleCheck</name>
<value>LOG</value>
<description>Defines what happens when plugin bundles are found and are duplicated [EXCEPTION|LOG|NONE]</description>
</property>
<property>
<name>hive.metastore.warehouse.dir</name>
<value>/user/hive/warehouse</value>
<description>location of default database for the warehouse</description>
</property>
<property>
<name>hive.metastore.execute.setugi</name>
<value>false</value>
<description>In unsecure mode, setting this property to true will cause the metastore to execute DFS operations using the client's reported user and group permissions. Note that this property must be set on both the client and server sides. Further note that its best effort. If client sets its to true and server sets it to false, client setting will be ignored.</description>
</property>
<property>
<name>hive.metastore.event.listeners</name>
<value></value>
<description>list of comma seperated listeners for metastore events.</description>
</property>
<property>
<name>hive.metastore.partition.inherit.table.properties</name>
<value></value>
<description>list of comma seperated keys occurring in table properties which will get inherited to newly created partitions. * implies all the keys will get inherited.</description>
</property>
<property>
<name>hive.metastore.end.function.listeners</name>
<value></value>
<description>list of comma separated listeners for the end of metastore functions.</description>
</property>
<property>
<name>hive.metastore.event.expiry.duration</name>
<value>0</value>
<description>Duration after which events expire from events table (in seconds)</description>
</property>
<property>
<name>hive.metastore.event.clean.freq</name>
<value>0</value>
<description>Frequency at which timer task runs to purge expired events in metastore(in seconds).</description>
</property>
<property>
<name>hive.metastore.connect.retries</name>
<value>5</value>
<description>Number of retries while opening a connection to metastore</description>
</property>
<property>
<name>hive.metastore.client.connect.retry.delay</name>
<value>1</value>
<description>Number of seconds for the client to wait between consecutive connection attempts</description>
</property>
<property>
<name>hive.metastore.client.socket.timeout</name>
<value>20</value>
<description>MetaStore Client socket timeout in seconds</description>
</property>
<property>
<name>hive.metastore.rawstore.impl</name>
<value>org.apache.hadoop.hive.metastore.ObjectStore</value>
<description>Name of the class that implements org.apache.hadoop.hive.metastore.rawstore interface. This class is used to store and retrieval of raw metadata objects such as table, database</description>
</property>
<property>
<name>hive.metastore.batch.retrieve.max</name>
<value>300</value>
<description>Maximum number of objects (tables/partitions) can be retrieved from metastore in one batch. The higher the number, the less the number of round trips is needed to the Hive metastore server, but it may also cause higher memory requirement at the client side.</description>
</property>
<property>
<name>hive.metastore.batch.retrieve.table.partition.max</name>
<value>1000</value>
<description>Maximum number of table partitions that metastore internally retrieves in one batch.</description>
</property>
<property>
<name>hive.default.fileformat</name>
<value>TextFile</value>
<description>Default file format for CREATE TABLE statement. Options are TextFile and SequenceFile. Users can explicitly say CREATE TABLE ... STORED AS <TEXTFILE|SEQUENCEFILE> to override</description>
</property>
<property>
<name>hive.fileformat.check</name>
<value>true</value>
<description>Whether to check file format or not when loading data files</description>
</property>
<property>
<name>hive.map.aggr</name>
<value>true</value>
<description>Whether to use map-side aggregation in Hive Group By queries</description>
</property>
<property>
<name>hive.groupby.skewindata</name>
<value>false</value>
<description>Whether there is skew in data to optimize group by queries</description>
</property>
<property>
<name>hive.groupby.mapaggr.checkinterval</name>
<value>100000</value>
<description>Number of rows after which size of the grouping keys/aggregation classes is performed</description>
</property>
<property>
<name>hive.mapred.local.mem</name>
<value>0</value>
<description>For local mode, memory of the mappers/reducers</description>
</property>
<property>
<name>hive.mapjoin.followby.map.aggr.hash.percentmemory</name>
<value>0.3</value>
<description>Portion of total memory to be used by map-side grup aggregation hash table, when this group by is followed by map join</description>
</property>
<property>
<name>hive.map.aggr.hash.force.flush.memory.threshold</name>
<value>0.9</value>
<description>The max memory to be used by map-side grup aggregation hash table, if the memory usage is higher than this number, force to flush data</description>
</property>
<property>
<name>hive.map.aggr.hash.percentmemory</name>
<value>0.5</value>
<description>Portion of total memory to be used by map-side grup aggregation hash table</description>
</property>
<property>
<name>hive.map.aggr.hash.min.reduction</name>
<value>0.5</value>
<description>Hash aggregation will be turned off if the ratio between hash
table size and input rows is bigger than this number. Set to 1 to make sure
hash aggregation is never turned off.</description>
</property>
<property>
<name>hive.optimize.cp</name>
<value>true</value>
<description>Whether to enable column pruner</description>
</property>
<property>
<name>hive.optimize.index.filter</name>
<value>false</value>
<description>Whether to enable automatic use of indexes</description>
</property>
<property>
<name>hive.optimize.index.groupby</name>
<value>false</value>
<description>Whether to enable optimization of group-by queries using Aggregate indexes.</description>
</property>
<property>
<name>hive.optimize.ppd</name>
<value>true</value>
<description>Whether to enable predicate pushdown</description>
</property>
<property>
<name>hive.optimize.ppd.storage</name>
<value>true</value>
<description>Whether to push predicates down into storage handlers. Ignored when hive.optimize.ppd is false.</description>
</property>
<property>
<name>hive.ppd.recognizetransivity</name>
<value>true</value>
<description>Whether to transitively replicate predicate filters over equijoin conditions.</description>
</property>
<property>
<name>hive.optimize.groupby</name>
<value>true</value>
<description>Whether to enable the bucketed group by from bucketed partitions/tables.</description>
</property>
<property>
<name>hive.multigroupby.singlemr</name>
<value>false</value>
<description>Whether to optimize multi group by query to generate single M/R
job plan. If the multi group by query has common group by keys, it will be
optimized to generate single M/R job.</description>
</property>
<property>
<name>hive.join.emit.interval</name>
<value>1000</value>
<description>How many rows in the right-most join operand Hive should buffer before emitting the join result. </description>
</property>
<property>
<name>hive.join.cache.size</name>
<value>25000</value>
<description>How many rows in the joining tables (except the streaming table) should be cached in memory. </description>
</property>
<property>
<name>hive.mapjoin.bucket.cache.size</name>
<value>100</value>
<description>How many values in each keys in the map-joined table should be cached in memory. </description>
</property>
<property>
<name>hive.mapjoin.cache.numrows</name>
<value>25000</value>
<description>How many rows should be cached by jdbm for map join. </description>
</property>
<property>
<name>hive.optimize.skewjoin</name>
<value>false</value>
<description>Whether to enable skew join optimization. </description>
</property>
<property>
<name>hive.skewjoin.key</name>
<value>100000</value>
<description>Determine if we get a skew key in join. If we see more
than the specified number of rows with the same key in join operator,
we think the key as a skew join key. </description>
</property>
<property>
<name>hive.skewjoin.mapjoin.map.tasks</name>
<value>10000</value>
<description> Determine the number of map task used in the follow up map join job
for a skew join. It should be used together with hive.skewjoin.mapjoin.min.split
to perform a fine grained control.</description>
</property>
<property>
<name>hive.skewjoin.mapjoin.min.split</name>
<value>33554432</value>
<description> Determine the number of map task at most used in the follow up map join job
for a skew join by specifying the minimum split size. It should be used together with
hive.skewjoin.mapjoin.map.tasks to perform a fine grained control.</description>
</property>
<property>
<name>hive.mapred.mode</name>
<value>nonstrict</value>
<description>The mode in which the hive operations are being performed. In strict mode, some risky queries are not allowed to run</description>
</property>
<property>
<name>hive.exec.script.maxerrsize</name>
<value>100000</value>
<description>Maximum number of bytes a script is allowed to emit to standard error (per map-reduce task). This prevents runaway scripts from filling logs partitions to capacity </description>
</property>
<property>
<name>hive.exec.script.allow.partial.consumption</name>
<value>false</value>
<description> When enabled, this option allows a user script to exit successfully without consuming all the data from the standard input.
</description>
</property>
<property>
<name>hive.script.operator.id.env.var</name>
<value>HIVE_SCRIPT_OPERATOR_ID</value>
<description> Name of the environment variable that holds the unique script operator ID in the user's transform function (the custom mapper/reducer that the user has specified in the query)
</description>
</property>
<property>
<name>hive.exec.compress.output</name>
<value>false</value>
<description> This controls whether the final outputs of a query (to a local/hdfs file or a hive table) is compressed. The compression codec and other options are determined from hadoop config variables mapred.output.compress* </description>
</property>
<property>
<name>hive.exec.compress.intermediate</name>
<value>false</value>
<description> This controls whether intermediate files produced by hive between multiple map-reduce jobs are compressed. The compression codec and other options are determined from hadoop config variables mapred.output.compress* </description>
</property>
<property>
<name>hive.exec.parallel</name>
<value>false</value>
<description>Whether to execute jobs in parallel</description>
</property>
<property>
<name>hive.exec.parallel.thread.number</name>
<value>8</value>
<description>How many jobs at most can be executed in parallel</description>
</property>
<property>
<name>hive.exec.rowoffset</name>
<value>false</value>
<description>Whether to provide the row offset virtual column</description>
</property>
<property>
<name>hive.task.progress</name>
<value>false</value>
<description>Whether Hive should periodically update task progress counters during execution. Enabling this allows task progress to be monitored more closely in the job tracker, but may impose a performance penalty. This flag is automatically set to true for jobs with hive.exec.dynamic.partition set to true.</description>
</property>
<property>
<name>hive.hwi.war.file</name>
<value>lib/hive-hwi-@VERSION@.war</value>
<description>This sets the path to the HWI war file, relative to ${HIVE_HOME}. </description>
</property>
<property>
<name>hive.hwi.listen.host</name>
<value>0.0.0.0</value>
<description>This is the host address the Hive Web Interface will listen on</description>
</property>
<property>
<name>hive.hwi.listen.port</name>
<value>9999</value>
<description>This is the port the Hive Web Interface will listen on</description>
</property>
<property>
<name>hive.exec.pre.hooks</name>
<value></value>
<description>Comma-separated list of pre-execution hooks to be invoked for each statement. A pre-execution hook is specified as the name of a Java class which implements the org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.</description>
</property>
<property>
<name>hive.exec.post.hooks</name>
<value></value>
<description>Comma-separated list of post-execution hooks to be invoked for each statement. A post-execution hook is specified as the name of a Java class which implements the org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.</description>
</property>
<property>
<name>hive.exec.failure.hooks</name>
<value></value>
<description>Comma-separated list of on-failure hooks to be invoked for each statement. An on-failure hook is specified as the name of Java class which implements the org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.</description>
</property>
<property>
<name>hive.client.stats.publishers</name>
<value></value>
<description>Comma-separated list of statistics publishers to be invoked on counters on each job. A client stats publisher is specified as the name of a Java class which implements the org.apache.hadoop.hive.ql.stats.ClientStatsPublisher interface.</description>
</property>
<property>
<name>hive.client.stats.counters</name>
<value></value>
<description>Subset of counters that should be of interest for hive.client.stats.publishers (when one wants to limit their publishing). Non-display names should be used</description>
</property>
<property>
<name>hive.merge.mapfiles</name>
<value>true</value>
<description>Merge small files at the end of a map-only job</description>
</property>
<property>
<name>hive.merge.mapredfiles</name>
<value>false</value>
<description>Merge small files at the end of a map-reduce job</description>
</property>
<property>
<name>hive.mergejob.maponly</name>
<value>true</value>
<description>Try to generate a map-only job for merging files if CombineHiveInputFormat is supported.</description>
</property>
<property>
<name>hive.heartbeat.interval</name>
<value>1000</value>
<description>Send a heartbeat after this interval - used by mapjoin and filter operators</description>
</property>
<property>
<name>hive.merge.size.per.task</name>
<value>256000000</value>
<description>Size of merged files at the end of the job</description>
</property>
<property>
<name>hive.merge.smallfiles.avgsize</name>
<value>16000000</value>
<description>When the average output file size of a job is less than this number, Hive will start an additional map-reduce job to merge the output files into bigger files. This is only done for map-only jobs if hive.merge.mapfiles is true, and for map-reduce jobs if hive.merge.mapredfiles is true.</description>
</property>
<property>
<name>hive.mapjoin.smalltable.filesize</name>
<value>25000000</value>
<description>The threshold for the input file size of the small tables; if the file size is smaller than this threshold, it will try to convert the common join into map join</description>
</property>
<property>
<name>hive.mapjoin.localtask.max.memory.usage</name>
<value>0.90</value>
<description>This number means how much memory the local task can take to hold the key/value into in-memory hash table; If the local task's memory usage is more than this number, the local task will be abort by themself. It means the data of small table is too large to be hold in the memory.</description>
</property>
<property>
<name>hive.mapjoin.followby.gby.localtask.max.memory.usage</name>
<value>0.55</value>
<description>This number means how much memory the local task can take to hold the key/value into in-memory hash table when this map join followed by a group by; If the local task's memory usage is more than this number, the local task will be abort by themself. It means the data of small table is too large to be hold in the memory.</description>
</property>
<property>
<name>hive.mapjoin.check.memory.rows</name>
<value>100000</value>
<description>The number means after how many rows processed it needs to check the memory usage</description>
</property>
<property>
<name>hive.auto.convert.join</name>
<value>false</value>
<description>Whether Hive enable the optimization about converting common join into mapjoin based on the input file size</description>
</property>
<property>
<name>hive.script.auto.progress</name>
<value>false</value>
<description>Whether Hive Tranform/Map/Reduce Clause should automatically send progress information to TaskTracker to avoid the task getting killed because of inactivity. Hive sends progress information when the script is outputting to stderr. This option removes the need of periodically producing stderr messages, but users should be cautious because this may prevent infinite loops in the scripts to be killed by TaskTracker. </description>
</property>
<property>
<name>hive.script.serde</name>
<value>org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe</value>
<description>The default serde for trasmitting input data to and reading output data from the user scripts. </description>
</property>
<property>
<name>hive.script.recordreader</name>
<value>org.apache.hadoop.hive.ql.exec.TextRecordReader</value>
<description>The default record reader for reading data from the user scripts. </description>
</property>
<property>
<name>hive.script.recordwriter</name>
<value>org.apache.hadoop.hive.ql.exec.TextRecordWriter</value>
<description>The default record writer for writing data to the user scripts. </description>
</property>
<property>
<name>hive.input.format</name>
<value>org.apache.hadoop.hive.ql.io.CombineHiveInputFormat</value>
<description>The default input format. Set this to HiveInputFormat if you encounter problems with CombineHiveInputFormat.</description>
</property>
<property>
<name>hive.udtf.auto.progress</name>
<value>false</value>
<description>Whether Hive should automatically send progress information to TaskTracker when using UDTF's to prevent the task getting killed because of inactivity. Users should be cautious because this may prevent TaskTracker from killing tasks with infinte loops. </description>
</property>
<property>
<name>hive.mapred.reduce.tasks.speculative.execution</name>
<value>true</value>
<description>Whether speculative execution for reducers should be turned on. </description>
</property>
<property>
<name>hive.exec.counters.pull.interval</name>
<value>1000</value>
<description>The interval with which to poll the JobTracker for the counters the running job. The smaller it is the more load there will be on the jobtracker, the higher it is the less granular the caught will be.</description>
</property>
<property>
<name>hive.enforce.bucketing</name>
<value>false</value>
<description>Whether bucketing is enforced. If true, while inserting into the table, bucketing is enforced. </description>
</property>
<property>
<name>hive.enforce.sorting</name>
<value>false</value>
<description>Whether sorting is enforced. If true, while inserting into the table, sorting is enforced. </description>
</property>
<property>
<name>hive.metastore.ds.connection.url.hook</name>
<value></value>
<description>Name of the hook to use for retriving the JDO connection URL. If empty, the value in javax.jdo.option.ConnectionURL is used </description>
</property>
<property>
<name>hive.metastore.ds.retry.attempts</name>
<value>1</value>
<description>The number of times to retry a metastore call if there were a connection error</description>
</property>
<property>
<name>hive.metastore.ds.retry.interval</name>
<value>1000</value>
<description>The number of miliseconds between metastore retry attempts</description>
</property>
<property>
<name>hive.metastore.server.min.threads</name>
<value>200</value>
<description>Minimum number of worker threads in the Thrift server's pool.</description>
</property>
<property>
<name>hive.metastore.server.max.threads</name>
<value>100000</value>
<description>Maximum number of worker threads in the Thrift server's pool.</description>
</property>
<property>
<name>hive.metastore.server.tcp.keepalive</name>
<value>true</value>
<description>Whether to enable TCP keepalive for the metastore server. Keepalive will prevent accumulation of half-open connections.</description>
</property>
<property>
<name>hive.metastore.sasl.enabled</name>
<value>false</value>
<description>If true, the metastore thrift interface will be secured with SASL. Clients must authenticate with Kerberos.</description>
</property>
<property>
<name>hive.metastore.thrift.framed.transport.enabled</name>
<value>false</value>
<description>If true, the metastore thrift interface will use TFramedTransport. When false (default) a standard TTransport is used.</description>
</property>
<property>
<name>hive.metastore.kerberos.keytab.file</name>
<value></value>
<description>The path to the Kerberos Keytab file containing the metastore thrift server's service principal.</description>
</property>
<property>
<name>hive.metastore.kerberos.principal</name>
<value>hive-metastore/_HOST@EXAMPLE.COM</value>
<description>The service principal for the metastore thrift server. The special string _HOST will be replaced automatically with the correct host name.</description>
</property>
<property>
<name>hive.cluster.delegation.token.store.class</name>
<value>org.apache.hadoop.hive.thrift.MemoryTokenStore</value>
<description>The delegation token store implementation. Set to org.apache.hadoop.hive.thrift.ZooKeeperTokenStore for load-balanced cluster.</description>
</property>
<property>
<name>hive.cluster.delegation.token.store.zookeeper.connectString</name>
<value>localhost:2181</value>
<description>The ZooKeeper token store connect string.</description>
</property>
<property>
<name>hive.cluster.delegation.token.store.zookeeper.znode</name>
<value>/hive/cluster/delegation</value>
<description>The root path for token store data.</description>
</property>
<property>
<name>hive.cluster.delegation.token.store.zookeeper.acl</name>
<value>sasl:hive/host1@EXAMPLE.COM:cdrwa,sasl:hive/host2@EXAMPLE.COM:cdrwa</value>
<description>ACL for token store entries. List comma separated all server principals for the cluster.</description>
</property>
<property>
<name>hive.metastore.cache.pinobjtypes</name>
<value>Table,StorageDescriptor,SerDeInfo,Partition,Database,Type,FieldSchema,Order</value>
<description>List of comma separated metastore object types that should be pinned in the cache</description>
</property>
<property>
<name>hive.optimize.reducededuplication</name>
<value>true</value>
<description>Remove extra map-reduce jobs if the data is already clustered by the same key which needs to be used again. This should always be set to true. Since it is a new feature, it has been made configurable.</description>
</property>
<property>
<name>hive.exec.dynamic.partition</name>
<value>true</value>
<description>Whether or not to allow dynamic partitions in DML/DDL.</description>
</property>
<property>
<name>hive.exec.dynamic.partition.mode</name>
<value>strict</value>
<description>In strict mode, the user must specify at least one static partition in case the user accidentally overwrites all partitions.</description>
</property>
<property>
<name>hive.exec.max.dynamic.partitions</name>
<value>1000</value>
<description>Maximum number of dynamic partitions allowed to be created in total.</description>
</property>
<property>
<name>hive.exec.max.dynamic.partitions.pernode</name>
<value>100</value>
<description>Maximum number of dynamic partitions allowed to be created in each mapper/reducer node.</description>
</property>
<property>
<name>hive.exec.max.created.files</name>
<value>100000</value>
<description>Maximum number of HDFS files created by all mappers/reducers in a MapReduce job.</description>
</property>
<property>
<name>hive.exec.default.partition.name</name>
<value>__HIVE_DEFAULT_PARTITION__</value>
<description>The default partition name in case the dynamic partition column value is null/empty string or anyother values that cannot be escaped. This value must not contain any special character used in HDFS URI (e.g., ':', '%', '/' etc). The user has to be aware that the dynamic partition value should not contain this value to avoid confusions.</description>
</property>
<property>
<name>hive.stats.dbclass</name>
<value>jdbc:derby</value>
<description>The default database that stores temporary hive statistics.</description>
</property>
<property>
<name>hive.stats.autogather</name>
<value>true</value>
<description>A flag to gather statistics automatically during the INSERT OVERWRITE command.</description>
</property>
<property>
<name>hive.stats.jdbcdriver</name>
<value>org.apache.derby.jdbc.EmbeddedDriver</value>
<description>The JDBC driver for the database that stores temporary hive statistics.</description>
</property>
<property>
<name>hive.stats.dbconnectionstring</name>
<value>jdbc:derby:;databaseName=TempStatsStore;create=true</value>
<description>The default connection string for the database that stores temporary hive statistics.</description>
</property>
<property>
<name>hive.stats.default.publisher</name>
<value></value>
<description>The Java class (implementing the StatsPublisher interface) that is used by default if hive.stats.dbclass is not JDBC or HBase.</description>
</property>
<property>
<name>hive.stats.default.aggregator</name>
<value></value>
<description>The Java class (implementing the StatsAggregator interface) that is used by default if hive.stats.dbclass is not JDBC or HBase.</description>
</property>
<property>
<name>hive.stats.jdbc.timeout</name>
<value>30</value>
<description>Timeout value (number of seconds) used by JDBC connection and statements.</description>
</property>
<property>
<name>hive.stats.retries.max</name>
<value>0</value>
<description>Maximum number of retries when stats publisher/aggregator got an exception updating intermediate database. Default is no tries on failures.</description>
</property>
<property>
<name>hive.stats.retries.wait</name>
<value>3000</value>
<description>The base waiting window (in milliseconds) before the next retry. The actual wait time is calculated by baseWindow * failues + baseWindow * (failure + 1) * (random number between [0.0,1.0]).</description>
</property>
<property>
<name>hive.support.concurrency</name>
<value>false</value>
<description>Whether hive supports concurrency or not. A zookeeper instance must be up and running for the default hive lock manager to support read-write locks.</description>
</property>
<property>
<name>hive.lock.numretries</name>
<value>100</value>
<description>The number of times you want to try to get all the locks</description>
</property>
<property>
<name>hive.unlock.numretries</name>
<value>10</value>
<description>The number of times you want to retry to do one unlock</description>
</property>
<property>
<name>hive.lock.sleep.between.retries</name>
<value>60</value>
<description>The sleep time (in seconds) between various retries</description>
</property>
<property>
<name>hive.zookeeper.quorum</name>
<value></value>
<description>The list of zookeeper servers to talk to. This is only needed for read/write locks.</description>
</property>
<property>
<name>hive.zookeeper.client.port</name>
<value>2181</value>
<description>The port of zookeeper servers to talk to. This is only needed for read/write locks.</description>
</property>
<property>
<name>hive.zookeeper.session.timeout</name>
<value>600000</value>
<description>Zookeeper client's session timeout. The client is disconnected, and as a result, all locks released, if a heartbeat is not sent in the timeout.</description>
</property>
<property>
<name>hive.zookeeper.namespace</name>
<value>hive_zookeeper_namespace</value>
<description>The parent node under which all zookeeper nodes are created.</description>
</property>
<property>
<name>hive.zookeeper.clean.extra.nodes</name>
<value>false</value>
<description>Clean extra nodes at the end of the session.</description>
</property>
<property>
<name>fs.har.impl</name>
<value>org.apache.hadoop.hive.shims.HiveHarFileSystem</value>
<description>The implementation for accessing Hadoop Archives. Note that this won't be applicable to Hadoop vers less than 0.20</description>
</property>
<property>
<name>hive.archive.enabled</name>
<value>false</value>
<description>Whether archiving operations are permitted</description>
</property>
<property>
<name>hive.archive.har.parentdir.settable</name>
<value>false</value>
<description>In new Hadoop versions, the parent directory must be set while
creating a HAR. Because this functionality is hard to detect with just version
numbers, this conf var needs to be set manually.</description>
</property>
<property>
<name>hive.fetch.output.serde</name>
<value>org.apache.hadoop.hive.serde2.DelimitedJSONSerDe</value>
<description>The serde used by FetchTask to serialize the fetch output.</description>
</property>
<property>
<name>hive.exec.mode.local.auto</name>
<value>false</value>
<description> Let hive determine whether to run in local mode automatically </description>
</property>
<property>
<name>hive.exec.drop.ignorenonexistent</name>
<value>true</value>
<description>
Do not report an error if DROP TABLE/VIEW specifies a non-existent table/view
</description>
</property>
<property>
<name>hive.exec.show.job.failure.debug.info</name>
<value>true</value>
<description>
If a job fails, whether to provide a link in the CLI to the task with the
most failures, along with debugging hints if applicable.
</description>
</property>
<property>
<name>hive.auto.progress.timeout</name>
<value>0</value>
<description>