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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7138) RegionSplitter's rollingSplit terminated with "/ by zero", and the _balancedSplit file was not deleted properly
Date Fri, 09 Nov 2012 11:34:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13493939#comment-13493939
] 

Hadoop QA commented on HBASE-7138:
----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12552817/RegionSplitter_HBASE-7138-0.94.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/3289//console

This message is automatically generated.
                
> RegionSplitter's rollingSplit terminated with "/ by zero", and the _balancedSplit file
was not deleted properly
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-7138
>                 URL: https://issues.apache.org/jira/browse/HBASE-7138
>             Project: HBase
>          Issue Type: Bug
>          Components: util
>    Affects Versions: 0.94.1
>         Environment: Ubuntu Server 10.04, Hadoop 1.0.3
>            Reporter: Davey Yan
>            Priority: Minor
>         Attachments: RegionSplitter_HBASE-7138-0.94.patch, RegionSplitter_HBASE-7138.patch
>
>
> The 'splitCount' in this line is zero in some scenario, then throw ArithmeticException:
/ by zero, and the '_balancedSplit' file was not deleted:
> {code:java}
>       LOG.debug("Avg Time / Split = "
>           + org.apache.hadoop.util.StringUtils.formatTime(tDiff / splitCount));
> {code}
> Steps to reproduce:
> {code}
> shell> create 'test2', 'i'
> shell> for i in 'a'..'z' do for j in 'a'..'z' do put 'test2', "#{i}#{j}", "i:#{j}",
"#{j}" end end
> {code}
> {noformat}
> $ bin/hbase org.apache.hadoop.hbase.util.RegionSplitter -r -o 2 test2 HexStringSplit
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.4.3-1240972,
built on 02/06/2012 10:48 GMT
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:host.name=dev-vm0
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:java.version=1.6.0_29
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Sun Microsystems
Inc.
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:java.home=/usr/lib/jvm/jdk1.6.0_29/jre
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:java.class.path=/opt/hbase/bin/../conf:/usr/lib/jvm/default-java/lib/tools.jar:/opt/hbase/bin/..:/opt/hbase/bin/../hbase-0.94.1.jar:/opt/hbase/bin/../hbase-0.94.1-tests.jar:/opt/hbase/bin/../lib/activation-1.1.jar:/opt/hbase/bin/../lib/asm-3.1.jar:/opt/hbase/bin/../lib/avro-1.5.3.jar:/opt/hbase/bin/../lib/avro-ipc-1.5.3.jar:/opt/hbase/bin/../lib/commons-beanutils-1.7.0.jar:/opt/hbase/bin/../lib/commons-beanutils-core-1.8.0.jar:/opt/hbase/bin/../lib/commons-cli-1.2.jar:/opt/hbase/bin/../lib/commons-codec-1.4.jar:/opt/hbase/bin/../lib/commons-collections-3.2.1.jar:/opt/hbase/bin/../lib/commons-configuration-1.6.jar:/opt/hbase/bin/../lib/commons-digester-1.8.jar:/opt/hbase/bin/../lib/commons-el-1.0.jar:/opt/hbase/bin/../lib/commons-httpclient-3.1.jar:/opt/hbase/bin/../lib/commons-io-2.1.jar:/opt/hbase/bin/../lib/commons-lang-2.5.jar:/opt/hbase/bin/../lib/commons-logging-1.1.1.jar:/opt/hbase/bin/../lib/commons-math-2.1.jar:/opt/hbase/bin/../lib/commons-net-1.4.1.jar:/opt/hbase/bin/../lib/core-3.1.1.jar:/opt/hbase/bin/../lib/guava-11.0.2.jar:/opt/hbase/bin/../lib/hadoop-core-1.0.3.jar:/opt/hbase/bin/../lib/high-scale-lib-1.1.1.jar:/opt/hbase/bin/../lib/httpclient-4.1.2.jar:/opt/hbase/bin/../lib/httpcore-4.1.3.jar:/opt/hbase/bin/../lib/jackson-core-asl-1.8.8.jar:/opt/hbase/bin/../lib/jackson-jaxrs-1.8.8.jar:/opt/hbase/bin/../lib/jackson-mapper-asl-1.8.8.jar:/opt/hbase/bin/../lib/jackson-xc-1.8.8.jar:/opt/hbase/bin/../lib/jamon-runtime-2.3.1.jar:/opt/hbase/bin/../lib/jasper-compiler-5.5.23.jar:/opt/hbase/bin/../lib/jasper-runtime-5.5.23.jar:/opt/hbase/bin/../lib/jaxb-api-2.1.jar:/opt/hbase/bin/../lib/jaxb-impl-2.2.3-1.jar:/opt/hbase/bin/../lib/jersey-core-1.8.jar:/opt/hbase/bin/../lib/jersey-json-1.8.jar:/opt/hbase/bin/../lib/jersey-server-1.8.jar:/opt/hbase/bin/../lib/jettison-1.1.jar:/opt/hbase/bin/../lib/jetty-6.1.26.jar:/opt/hbase/bin/../lib/jetty-util-6.1.26.jar:/opt/hbase/bin/../lib/jruby-complete-1.6.5.jar:/opt/hbase/bin/../lib/jsp-2.1-6.1.14.jar:/opt/hbase/bin/../lib/jsp-api-2.1-6.1.14.jar:/opt/hbase/bin/../lib/jsr305-1.3.9.jar:/opt/hbase/bin/../lib/junit-4.10-HBASE-1.jar:/opt/hbase/bin/../lib/libthrift-0.8.0.jar:/opt/hbase/bin/../lib/log4j-1.2.16.jar:/opt/hbase/bin/../lib/metrics-core-2.1.2.jar:/opt/hbase/bin/../lib/netty-3.2.4.Final.jar:/opt/hbase/bin/../lib/protobuf-java-2.4.0a.jar:/opt/hbase/bin/../lib/servlet-api-2.5-6.1.14.jar:/opt/hbase/bin/../lib/slf4j-api-1.4.3.jar:/opt/hbase/bin/../lib/slf4j-log4j12-1.4.3.jar:/opt/hbase/bin/../lib/snappy-java-1.0.3.2.jar:/opt/hbase/bin/../lib/stax-api-1.0.1.jar:/opt/hbase/bin/../lib/velocity-1.7.jar:/opt/hbase/bin/../lib/xmlenc-0.52.jar:/opt/hbase/bin/../lib/zookeeper-3.4.3.jar:/opt/hbase/bin/../libextra/mybk-commons-cc.jar:/opt/hbase/bin/../libextra/hbase.jar:/opt/hbase/bin/../libextra/sfdcloud-hbase.jar:
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:java.library.path=/opt/hbase/bin/../lib/native/Linux-i386-32
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=/tmp
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:java.compiler=<NA>
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:os.name=Linux
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:os.arch=i386
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:os.version=2.6.32-33-generic
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:user.name=pcer
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:user.home=/home/pcer
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Client environment:user.dir=/opt/hbase-0.94.1
> 12/11/08 19:20:40 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=dev-vm0:2181
sessionTimeout=60000 watcher=hconnection
> 12/11/08 19:20:40 INFO zookeeper.ClientCnxn: Opening socket connection to server /172.16.20.140:2181
> 12/11/08 19:20:40 INFO zookeeper.RecoverableZooKeeper: The identifier of this process
is 28728@dev-vm0
> 12/11/08 19:20:40 WARN client.ZooKeeperSaslClient: SecurityException: java.lang.SecurityException:
Unable to locate a login configuration occurred when trying to find JAAS configuration.
> 12/11/08 19:20:40 INFO client.ZooKeeperSaslClient: Client will not SASL-authenticate
because the default JAAS configuration section 'Client' could not be found. If you are not
using SASL, you may ignore this. On the other hand, if you expected SASL to work, please fix
your JAAS configuration.
> 12/11/08 19:20:40 INFO zookeeper.ClientCnxn: Socket connection established to dev-vm0/172.16.20.140:2181,
initiating session
> 12/11/08 19:20:40 INFO zookeeper.ClientCnxn: Session establishment complete on server
dev-vm0/172.16.20.140:2181, sessionid = 0x13ad3e9ba700150, negotiated timeout = 40000
> 12/11/08 19:20:40 DEBUG client.HConnectionManager$HConnectionImplementation: Looked up
root region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba5c7a;
serverName=dev-vm0,46871,1352175042380
> 12/11/08 19:20:41 DEBUG client.HConnectionManager$HConnectionImplementation: Cached location
for .META.,,1.1028785192 is dev-vm0:46871
> 12/11/08 19:20:41 DEBUG client.MetaScanner: Scanning .META. starting at row=test2,,00000000000000
for max=10 rows using org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba5c7a
> 12/11/08 19:20:41 DEBUG client.HConnectionManager$HConnectionImplementation: Cached location
for test2,,1352373607304.8341524d6c8b105b1722961ebda3a048. is dev-vm0:46871
> 12/11/08 19:20:41 DEBUG util.RegionSplitter: No _balancedSplit file.  Calculating splits...
> 12/11/08 19:20:41 DEBUG client.MetaScanner: Scanning .META. starting at row=test2,,00000000000000
for max=2147483647 rows using org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba5c7a
> 12/11/08 19:20:41 DEBUG util.RegionSplitter: Table test2 has 1 regions that will be split.
> 12/11/08 19:20:41 DEBUG util.RegionSplitter: Will Split [00000000 , ffffffff) at 7fffffff
> 12/11/08 19:20:41 DEBUG util.RegionSplitter: Bucketing regions by regionserver...
> 12/11/08 19:20:41 DEBUG util.RegionSplitter: Done with bucketing.  Split time!
> 12/11/08 19:20:41 DEBUG util.RegionSplitter: 1 RS have regions to splt.
> 12/11/08 19:20:41 DEBUG client.MetaScanner: Scanning .META. starting at row=test2,,00000000000000
for max=2147483647 rows using org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba5c7a
> 12/11/08 19:20:41 DEBUG util.RegionSplitter: Finding a region on dev-vm0:46871
> 12/11/08 19:20:41 DEBUG util.RegionSplitter: Splitting at 7fffffff
> 12/11/08 19:20:41 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=dev-vm0:2181
sessionTimeout=60000 watcher=catalogtracker-on-org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba5c7a
> 12/11/08 19:20:41 INFO zookeeper.ClientCnxn: Opening socket connection to server /172.16.20.140:2181
> 12/11/08 19:20:41 WARN client.ZooKeeperSaslClient: SecurityException: java.lang.SecurityException:
Unable to locate a login configuration occurred when trying to find JAAS configuration.
> 12/11/08 19:20:41 INFO client.ZooKeeperSaslClient: Client will not SASL-authenticate
because the default JAAS configuration section 'Client' could not be found. If you are not
using SASL, you may ignore this. On the other hand, if you expected SASL to work, please fix
your JAAS configuration.
> 12/11/08 19:20:41 INFO zookeeper.ClientCnxn: Socket connection established to dev-vm0/172.16.20.140:2181,
initiating session
> 12/11/08 19:20:41 INFO zookeeper.ClientCnxn: Session establishment complete on server
dev-vm0/172.16.20.140:2181, sessionid = 0x13ad3e9ba700151, negotiated timeout = 40000
> 12/11/08 19:20:41 INFO zookeeper.RecoverableZooKeeper: The identifier of this process
is 28728@dev-vm0
> 12/11/08 19:20:41 DEBUG catalog.CatalogTracker: Starting catalog tracker org.apache.hadoop.hbase.catalog.CatalogTracker@29c58e
> 12/11/08 19:20:41 DEBUG client.ClientScanner: Creating scanner over .META. starting at
key 'test2,,'
> 12/11/08 19:20:41 DEBUG client.ClientScanner: Advancing internal scanner to startKey
at 'test2,,'
> 12/11/08 19:20:41 DEBUG client.ClientScanner: Creating scanner over .META. starting at
key 'test2,,'
> 12/11/08 19:20:41 DEBUG client.ClientScanner: Advancing internal scanner to startKey
at 'test2,,'
> 12/11/08 19:20:41 DEBUG client.ClientScanner: Finished with scanning at {NAME => '.META.,,1',
STARTKEY => '', ENDKEY => '', ENCODED => 1028785192,}
> 12/11/08 19:20:41 DEBUG catalog.CatalogTracker: Stopping catalog tracker org.apache.hadoop.hbase.catalog.CatalogTracker@29c58e
> 12/11/08 19:20:41 INFO zookeeper.ZooKeeper: Session: 0x13ad3e9ba700151 closed
> 12/11/08 19:20:41 INFO zookeeper.ClientCnxn: EventThread shut down
> 12/11/08 19:20:41 DEBUG client.HConnectionManager$HConnectionImplementation: Looked up
root region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba5c7a;
serverName=dev-vm0,46871,1352175042380
> 12/11/08 19:20:41 DEBUG client.HConnectionManager$HConnectionImplementation: Cached location
for .META.,,1.1028785192 is dev-vm0:46871
> 12/11/08 19:20:41 DEBUG client.MetaScanner: Scanning .META. starting at row=test2,,00000000000000
for max=10 rows using org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba5c7a
> 12/11/08 19:20:41 DEBUG client.HConnectionManager$HConnectionImplementation: Cached location
for test2,,1352373607304.8341524d6c8b105b1722961ebda3a048. is dev-vm0:46871
> 12/11/08 19:20:41 DEBUG util.RegionSplitter: Split Scan: 0 finished / 1 split wait /
0 reference wait
> 12/11/08 19:21:11 DEBUG client.HConnectionManager$HConnectionImplementation: Looked up
root region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba5c7a;
serverName=dev-vm0,46871,1352175042380
> 12/11/08 19:21:11 DEBUG client.HConnectionManager$HConnectionImplementation: Cached location
for .META.,,1.1028785192 is dev-vm0:46871
> 12/11/08 19:21:11 DEBUG client.MetaScanner: Scanning .META. starting at row=test2,7fffffff,00000000000000
for max=10 rows using org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba5c7a
> 12/11/08 19:21:11 DEBUG client.HConnectionManager$HConnectionImplementation: Cached location
for test2,7fffffff,1352373641571.d56fbb146b77bbc87c294766fabcb3c4. is dev-vm0:46871
> 12/11/08 19:21:11 DEBUG client.MetaScanner: Scanning .META. starting at row=test2,,00000000000000
for max=10 rows using org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@ba5c7a
> 12/11/08 19:21:11 DEBUG client.HConnectionManager$HConnectionImplementation: Cached location
for test2,,1352373641571.4e805892dd68d69ba02f72303973ee0e. is dev-vm0:46871
> 12/11/08 19:21:12 DEBUG util.RegionSplitter: Split Scan: 1 finished / 0 split wait /
0 reference wait
> 12/11/08 19:21:12 DEBUG util.RegionSplitter: All regions have been successfully split!
> 12/11/08 19:21:12 DEBUG util.RegionSplitter: TOTAL TIME = 30sec
> 12/11/08 19:21:12 DEBUG util.RegionSplitter: Splits = 0
> Exception in thread "main" java.lang.ArithmeticException: / by zero
> 	at org.apache.hadoop.hbase.util.RegionSplitter.rollingSplit(RegionSplitter.java:576)
> 	at org.apache.hadoop.hbase.util.RegionSplitter.main(RegionSplitter.java:349)
> {noformat}
> The attached patch was tested and worked well.

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