[ 
https://issues.apache.org/jira/browse/LENS-893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15203940#comment-15203940
 ] 

Amareshwari Sriramadasu commented on LENS-893:
----------------------------------------------

We are seeing following exceptions in our production:
{noformat}
17 Mar 2016 08:58:58 [c6000f1d-f098-4b94-8298-36fcea70edf6] [StatusPoller] 
ERROR org.apache.lens.server.query.QueryExecutionServiceImpl - Status update 
failed for c6000f1d-f098-4b94-8298-36fcea70edf6
org.apache.lens.server.api.error.LensException: Internal Server Error.
        at 
org.apache.lens.driver.hive.HiveDriver.updateStatus(HiveDriver.java:681) 
~[lens-driver-hive-2.6.0-inm.jar:2.6.0-inm]
        at 
org.apache.lens.server.query.QueryExecutionServiceImpl.updateStatus(QueryExecutionServiceImpl.java:887)
 [classes/:na]
        at 
org.apache.lens.server.query.QueryExecutionServiceImpl.access$1600(QueryExecutionServiceImpl.java:98)
 [classes/:na]
        at 
org.apache.lens.server.query.QueryExecutionServiceImpl$StatusPoller.run(QueryExecutionServiceImpl.java:789)
 [classes/:na]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_72]
Caused by: org.apache.hive.service.cli.HiveSQLException: Unable to connect 
after 3 retries
        at 
org.apache.hive.service.cli.thrift.RetryingThriftCLIServiceClient.connectWithRetry(RetryingThriftCLIServiceClient.java:241)
 ~[hive-service-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.hive.service.cli.thrift.RetryingThriftCLIServiceClient.invoke(RetryingThriftCLIServiceClient.java:335)
 ~[hive-service-0.13.4-inm.jar:0.13.4-inm]
        at com.sun.proxy.$Proxy44.getOperationStatus(Unknown Source) ~[na:na]
        at 
org.apache.hive.service.cli.thrift.RetryingThriftCLIServiceClient$CLIServiceClientWrapper.getOperationStatus(RetryingThriftCLIServiceClient.java:162)
 ~[hive-service-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.lens.driver.hive.HiveDriver.updateStatus(HiveDriver.java:601) 
~[lens-driver-hive-2.6.0-inm.jar:2.6.0-inm]
        ... 4 common frames omitted
Caused by: org.apache.thrift.transport.TTransportException: 
java.net.SocketException: Socket closed
        at 
org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:129)
 ~[hive-exec-0.13.4-inm.jar:0.13.4-inm]
        at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84) 
~[hive-exec-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.thrift.transport.TSaslTransport.receiveSaslMessage(TSaslTransport.java:178)
 ~[hive-exec-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.thrift.transport.TSaslTransport.open(TSaslTransport.java:288) 
~[hive-exec-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.thrift.transport.TSaslClientTransport.open(TSaslClientTransport.java:37)
 ~[hive-exec-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.hive.service.cli.thrift.RetryingThriftCLIServiceClient.connect(RetryingThriftCLIServiceClient.java:280)
 ~[hive-service-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.hive.service.cli.thrift.RetryingThriftCLIServiceClient.connectWithRetry(RetryingThriftCLIServiceClient.java:237)
 ~[hive-service-0.13.4-inm.jar:0.13.4-inm]
        ... 8 common frames omitted
Caused by: java.net.SocketException: Socket closed
        at java.net.SocketInputStream.read(SocketInputStream.java:203) 
~[na:1.8.0_72]
        at java.net.SocketInputStream.read(SocketInputStream.java:141) 
~[na:1.8.0_72]
        at java.io.BufferedInputStream.fill(BufferedInputStream.java:246) 
~[na:1.8.0_72]
        at java.io.BufferedInputStream.read1(BufferedInputStream.java:286) 
~[na:1.8.0_72]
        at java.io.BufferedInputStream.read(BufferedInputStream.java:345) 
~[na:1.8.0_72]
        at 
org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:127)
 ~[hive-exec-0.13.4-inm.jar:0.13.4-inm]
        ... 14 common frames omitted
{noformat}

or
{noformat}
17 Mar 2016 08:49:55 [c6000f1d-f098-4b94-8298-36fcea70edf6] [StatusPoller] 
ERROR org.apache.lens.driver.hive.HiveDriver - Error getting query status
org.apache.hive.service.cli.HiveSQLException: Unable to connect after 3 retries
        at 
org.apache.hive.service.cli.thrift.RetryingThriftCLIServiceClient.connectWithRetry(RetryingThriftCLIServiceClient.java:241)
 ~[hive-service-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.hive.service.cli.thrift.RetryingThriftCLIServiceClient.invoke(RetryingThriftCLIServiceClient.java:335)
 ~[hive-service-0.13.4-inm.jar:0.13.4-inm]
        at com.sun.proxy.$Proxy44.getOperationStatus(Unknown Source) ~[na:na]
        at 
org.apache.hive.service.cli.thrift.RetryingThriftCLIServiceClient$CLIServiceClientWrapper.getOperationStatus(RetryingThriftCLIServiceClient.java:162)
 ~[hive-service-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.lens.driver.hive.HiveDriver.updateStatus(HiveDriver.java:601) 
~[lens-driver-hive-2.6.0-inm.jar:2.6.0-inm]
        at 
org.apache.lens.server.query.QueryExecutionServiceImpl.updateStatus(QueryExecutionServiceImpl.java:887)
 [classes/:na]
        at 
org.apache.lens.server.query.QueryExecutionServiceImpl.access$1600(QueryExecutionServiceImpl.java:98)
 [classes/:na]
        at 
org.apache.lens.server.query.QueryExecutionServiceImpl$StatusPoller.run(QueryExecutionServiceImpl.java:789)
 [classes/:na]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_72]
Caused by: org.apache.thrift.transport.TTransportException: 
java.net.SocketException: Socket closed
        at 
org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:129)
 ~[hive-exec-0.13.4-inm.jar:0.13.4-inm]
        at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84) 
~[hive-exec-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.thrift.transport.TSaslTransport.receiveSaslMessage(TSaslTransport.java:178)
 ~[hive-exec-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.thrift.transport.TSaslTransport.open(TSaslTransport.java:288) 
~[hive-exec-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.thrift.transport.TSaslClientTransport.open(TSaslClientTransport.java:37)
 ~[hive-exec-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.hive.service.cli.thrift.RetryingThriftCLIServiceClient.connect(RetryingThriftCLIServiceClient.java:280)
 ~[hive-service-0.13.4-inm.jar:0.13.4-inm]
        at 
org.apache.hive.service.cli.thrift.RetryingThriftCLIServiceClient.connectWithRetry(RetryingThriftCLIServiceClient.java:237)
 ~[hive-service-0.13.4-inm.jar:0.13.4-inm]
        ... 8 common frames omitted
Caused by: java.net.SocketException: Socket closed
        at java.net.SocketInputStream.read(SocketInputStream.java:203) 
~[na:1.8.0_72]
        at java.net.SocketInputStream.read(SocketInputStream.java:141) 
~[na:1.8.0_72]
        at java.io.BufferedInputStream.fill(BufferedInputStream.java:246) 
~[na:1.8.0_72]
        at java.io.BufferedInputStream.read1(BufferedInputStream.java:286) 
~[na:1.8.0_72]
        at java.io.BufferedInputStream.read(BufferedInputStream.java:345) 
~[na:1.8.0_72]
        at 
org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:127)
 ~[hive-exec-0.13.4-inm.jar:0.13.4-inm]
        ... 14 common frames omitted
{noformat}

Planning to add exponential back-off for next retry from lens status poller, 
and getStatus API call would give last known status.
 

> Query Service should not mark queries failed in case driver is not responding 
> in a timely manner
> ------------------------------------------------------------------------------------------------
>
>                 Key: LENS-893
>                 URL: https://issues.apache.org/jira/browse/LENS-893
>             Project: Apache Lens
>          Issue Type: Improvement
>          Components: server
>            Reporter: Rajat Khandelwal
>            Assignee: Amareshwari Sriramadasu
>             Fix For: 2.6
>
>
> Exponential backoff can be done in update status. 



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