Is this /etc/hbase/conf/hbase-site.xml file is present on all of the machines? If yes, could you share your code?On 20 Oct 2017, at 16:29, Niels Basjes <[hidden email]> wrote:I look at the logfiles from the Hadoop Yarn webinterface. I.e. actually looking in the jobmanager.log of the container running the Flink task.That is where I was able to find these messages .I do thehbaseConfig.addResource(new Path("file:/etc/hbase/conf/hbase-site.xml")); in all places directly after the HBaseConfiguration.create();That way I simply force the task to look on the actual Hadoop node for the same file it already loaded locally.The reason I'm suspecting Flink is because the clientside part of the Flink application does have the right setting and the task/job actually running in the cluster does not have the same settings.So it seems in the transition into the cluster the application does not copy everything it has available locally for some reason.There is a very high probability I did something wrong, I'm just not seeing it at this moment.NielsOn Fri, Oct 20, 2017 at 2:53 PM, Piotr Nowojski <[hidden email]> wrote:Hi,What do you mean by saying:When I open the logfiles on the Hadoop cluster I see this:The error doesn’t come from Flink? Where do you executehbaseConfig.addResource(new Path("file:/etc/hbase/conf/hbase-site.xml")); ?To me it seems like it is a problem with misconfigured HBase and not something related to Flink.PiotrekOn 20 Oct 2017, at 13:44, Niels Basjes <[hidden email]> wrote:To facilitate you guys helping me I put this test project on github:Niels BasjesOn Fri, Oct 20, 2017 at 1:32 PM, Niels Basjes <[hidden email]> wrote:Hi,Ik have a Flink 1.3.2 application that I want to run on a Hadoop yarn cluster where I need to connect to HBase.What I have:In my environment:HADOOP_CONF_DIR=/etc/hadoop/conf/ HBASE_CONF_DIR=/etc/hbase/conf/ HIVE_CONF_DIR=/etc/hive/conf/YARN_CONF_DIR=/etc/hadoop/conf/ In /etc/hbase/conf/hbase-site.xml I have correctly defined the zookeeper hosts for HBase.My test code is this:public class Main {
private static final Logger LOG = LoggerFactory.getLogger(Main.class );
public static void main(String[] args) throws Exception {
printZookeeperConfig();
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment ().setParallelism(1);
env.createInput(new HBaseSource()).print();
env.execute("HBase config problem");
}
public static void printZookeeperConfig() {
String zookeeper = HBaseConfiguration.create().get("hbase.zookeeper.quorum");
LOG.info("----> Loading HBaseConfiguration: Zookeeper = {}", zookeeper);
}
public static class HBaseSource extends AbstractTableInputFormat<String> {
@Override
public void configure(org.apache.flink.configuration.Configuration parameters) {
table = createTable();
if (table != null) {
scan = getScanner();
}
}
private HTable createTable() {
LOG.info("Initializing HBaseConfiguration");
// Uses files found in the classpath
org.apache.hadoop.conf.Configuration hConf = HBaseConfiguration.create();
printZookeeperConfig();
try {
return new HTable(hConf, getTableName());
} catch (Exception e) {
LOG.error("Error instantiating a new HTable instance", e);
}
return null;
}
@Override
public String getTableName() {
return "bugs:flink";
}
@Override
protected String mapResultToOutType(Result result) {
return new String(result.getFamilyMap("v".getBytes(UTF_8)).get("column" .getBytes(UTF_8)));
}
@Override
protected Scan getScanner() {
return new Scan();
}
}
}I run this application with this command on my Yarn cluster (note: first starting a yarn-cluster and then submitting the job yields the same result).flink \
run \
-m yarn-cluster \
--yarncontainer 1 \
--yarnname "Flink on Yarn HBase problem" \
--yarnslots 1 \
--yarnjobManagerMemory 4000 \
--yarntaskManagerMemory 4000 \
--yarnstreaming \
target/flink-hbase-connect-1.0-SNAPSHOT.jar Now in the client side logfile /usr/local/flink-1.3.2/log/flink--client-80d2d21b10e0.log I see 1) Classpath actually contains /etc/hbase/conf/ both near the start and at the end.2) The zookeeper settings of my experimental environent have been picked up by the software2017-10-20 11:17:23,973 INFO com.bol.bugreports.Main - ----> Loading HBaseConfiguration: Zookeeper = node1.kluster.local.nl.bol.com:2181 ,node2.kluster.local.nl.bol.com:2181 ,node3.kluster.local.nl.bol.com:2181 When I open the logfiles on the Hadoop cluster I see this:2017-10-20 13:17:33,250 INFO com.bol.bugreports.Main - ----> Loading HBaseConfiguration: Zookeeper = localhostand as a consequence2017-10-20 13:17:33,368 INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server localhost.localdomain/127.0.0. 1:2181 2017-10-20 13:17:33,369 WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.net.ConnectException: Connection refusedat sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl .java:717) at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientC nxnSocketNIO.java:361) at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.ja va:1081) 2017-10-20 13:17:33,475 WARN org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper - Possibly transient ZooKeeper, quorum=localhost:2181, exception=org.apache.zookeeper .KeeperException$ConnectionLos sException: KeeperErrorCode = ConnectionLoss for /hbase/hbaseid The value 'localhost:2181' has been defined within the HBase jar in the hbase-default.xml as the default value for the zookeeper nodes.As a workaround I currently put this extra line in my code which I know is nasty but "works on my cluster"hbaseConfig.addResource(new Path("file:/etc/hbase/conf/hbase-site.xml" ));What am I doing wrong?What is the right way to fix this?--Best regards / Met vriendelijke groeten,
Niels Basjes--Best regards / Met vriendelijke groeten,
Niels Basjes--Best regards / Met vriendelijke groeten,
Niels Basjes
| Free forum by Nabble | Edit this page |