Hey Hive gurus -

Does anyone know how the CLI handles metastore connection timeouts? It
seems if I leave a CLI session idle more than
hive.metastore.client.socket.timeout seconds then run "show tables",
the cli hangs for the timeout then throws a SocketTimeoutException.
Restarting the CLI and running the same "show tables" always works.

Does anyone else see this? My hive.metastore.client.socket.timeout is
set to 60 - is that a reasonable value?

--travis

Are you communicating with a thrift metastore or a JDBC metastore? I
have had connections opened for long periods of time and never
remember experiencing them timeout.

Edward

On Wed, Aug 1, 2012 at 12:01 PM, Travis Crawford
<[EMAIL PROTECTED]> wrote:
> Hey Hive gurus -
>
> Does anyone know how the CLI handles metastore connection timeouts? It
> seems if I leave a CLI session idle more than
> hive.metastore.client.socket.timeout seconds then run "show tables",
> the cli hangs for the timeout then throws a SocketTimeoutException.
> Restarting the CLI and running the same "show tables" always works.
>
> Does anyone else see this? My hive.metastore.client.socket.timeout is
> set to 60 - is that a reasonable value?
>
> --travis

I'm using the thrift metastore via TFramedTransport. What value do you
specify for hive.metastore.client.socket.timeout? I'm using 60.

If I open the CLI, run "show tables", wait the timeout period, then
run "show tables" the CLI hangs in:

"main" prio=10 tid=0x000000004151a000 nid=0x448 runnable [0x0000000041b42000]
   java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:129)
at org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:127)
at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
at org.apache.thrift.transport.TFramedTransport.readFrame(TFramedTransport.java:129)
at org.apache.thrift.transport.TFramedTransport.read(TFramedTransport.java:101)
at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
at org.apache.thrift.protocol.TBinaryProtocol.readAll(TBinaryProtocol.java:378)
at org.apache.thrift.protocol.TBinaryProtocol.readI32(TBinaryProtocol.java:297)
at org.apache.thrift.protocol.TBinaryProtocol.readMessageBegin(TBinaryProtocol.java:204)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:69)
at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.recv_get_database(ThriftHiveMetastore.java:374)
at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.get_database(ThriftHiveMetastore.java:361)
at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getDatabase(HiveMetaStoreClient.java:705)
at org.apache.hadoop.hive.ql.metadata.Hive.getDatabase(Hive.java:1077)
at org.apache.hadoop.hive.ql.metadata.Hive.databaseExists(Hive.java:1066)
at org.apache.hadoop.hive.ql.exec.DDLTask.showTables(DDLTask.java:2004)
at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:325)
at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:134)
at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57)
at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1329)
at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1115)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:948)
at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:259)
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:216)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:412)
at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:750)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:613)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:186)

--travis
On Wed, Aug 1, 2012 at 11:31 AM, Edward Capriolo <[EMAIL PROTECTED]> wrote:
> Are you communicating with a thrift metastore or a JDBC metastore? I
> have had connections opened for long periods of time and never
> remember experiencing them timeout.
>
> Edward
>
>
>
> On Wed, Aug 1, 2012 at 12:01 PM, Travis Crawford
> <[EMAIL PROTECTED]> wrote:
>> Hey Hive gurus -
>>
>> Does anyone know how the CLI handles metastore connection timeouts? It
>> seems if I leave a CLI session idle more than
>> hive.metastore.client.socket.timeout seconds then run "show tables",
>> the cli hangs for the timeout then throws a SocketTimeoutException.
>> Restarting the CLI and running the same "show tables" always works.
>>
>> Does anyone else see this? My hive.metastore.client.socket.timeout is
>> set to 60 - is that a reasonable value?
>>
>> --travis

I feel that that interface is very rarely used in the wild. The only
use case I can figure out for it is people with very in depth hive
experience that do not wish to interact with hive through the QL
language. That being said I would think the coverage might be a little
weak there. With the local metastore users have data nucleus providing
support for reconnection etc.

On Wed, Aug 1, 2012 at 2:35 PM, Travis Crawford
<[EMAIL PROTECTED]> wrote:
> I'm using the thrift metastore via TFramedTransport. What value do you
> specify for hive.metastore.client.socket.timeout? I'm using 60.
>
> If I open the CLI, run "show tables", wait the timeout period, then
> run "show tables" the CLI hangs in:
>
> "main" prio=10 tid=0x000000004151a000 nid=0x448 runnable [0x0000000041b42000]
>    java.lang.Thread.State: RUNNABLE
>         at java.net.SocketInputStream.socketRead0(Native Method)
>         at java.net.SocketInputStream.read(SocketInputStream.java:129)
>         at org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:127)
>         at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
>         at org.apache.thrift.transport.TFramedTransport.readFrame(TFramedTransport.java:129)
>         at org.apache.thrift.transport.TFramedTransport.read(TFramedTransport.java:101)
>         at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
>         at org.apache.thrift.protocol.TBinaryProtocol.readAll(TBinaryProtocol.java:378)
>         at org.apache.thrift.protocol.TBinaryProtocol.readI32(TBinaryProtocol.java:297)
>         at org.apache.thrift.protocol.TBinaryProtocol.readMessageBegin(TBinaryProtocol.java:204)
>         at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:69)
>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.recv_get_database(ThriftHiveMetastore.java:374)
>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.get_database(ThriftHiveMetastore.java:361)
>         at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getDatabase(HiveMetaStoreClient.java:705)
>         at org.apache.hadoop.hive.ql.metadata.Hive.getDatabase(Hive.java:1077)
>         at org.apache.hadoop.hive.ql.metadata.Hive.databaseExists(Hive.java:1066)
>         at org.apache.hadoop.hive.ql.exec.DDLTask.showTables(DDLTask.java:2004)
>         at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:325)
>         at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:134)
>         at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57)
>         at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1329)
>         at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1115)
>         at org.apache.hadoop.hive.ql.Driver.run(Driver.java:948)
>         at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:259)
>         at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:216)
>         at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:412)
>         at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:750)
>         at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:613)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.hadoop.util.RunJar.main(RunJar.java:186)
>
> --travis
>
>
> On Wed, Aug 1, 2012 at 11:31 AM, Edward Capriolo <[EMAIL PROTECTED]> wrote:
>> Are you communicating with a thrift metastore or a JDBC metastore? I
>> have had connections opened for long periods of time and never
>> remember experiencing them timeout.
>>
>> Edward
>>
>>
>>
>> On Wed, Aug 1, 2012 at 12:01 PM, Travis Crawford
>> <[EMAIL PROTECTED]> wrote:
>>> Hey Hive gurus -

Oh interesting - you're saying instead of running a single
HiveMetaStore thrift service, most users use the embedded
HiveMetaStore mode and have each CLI instance connect to the DB
directly?

--travis
On Wed, Aug 1, 2012 at 11:47 AM, Edward Capriolo <[EMAIL PROTECTED]> wrote:
> I feel that that interface is very rarely used in the wild. The only
> use case I can figure out for it is people with very in depth hive
> experience that do not wish to interact with hive through the QL
> language. That being said I would think the coverage might be a little
> weak there. With the local metastore users have data nucleus providing
> support for reconnection etc.
>
> On Wed, Aug 1, 2012 at 2:35 PM, Travis Crawford
> <[EMAIL PROTECTED]> wrote:
>> I'm using the thrift metastore via TFramedTransport. What value do you
>> specify for hive.metastore.client.socket.timeout? I'm using 60.
>>
>> If I open the CLI, run "show tables", wait the timeout period, then
>> run "show tables" the CLI hangs in:
>>
>> "main" prio=10 tid=0x000000004151a000 nid=0x448 runnable [0x0000000041b42000]
>>    java.lang.Thread.State: RUNNABLE
>>         at java.net.SocketInputStream.socketRead0(Native Method)
>>         at java.net.SocketInputStream.read(SocketInputStream.java:129)
>>         at org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:127)
>>         at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
>>         at org.apache.thrift.transport.TFramedTransport.readFrame(TFramedTransport.java:129)
>>         at org.apache.thrift.transport.TFramedTransport.read(TFramedTransport.java:101)
>>         at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
>>         at org.apache.thrift.protocol.TBinaryProtocol.readAll(TBinaryProtocol.java:378)
>>         at org.apache.thrift.protocol.TBinaryProtocol.readI32(TBinaryProtocol.java:297)
>>         at org.apache.thrift.protocol.TBinaryProtocol.readMessageBegin(TBinaryProtocol.java:204)
>>         at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:69)
>>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.recv_get_database(ThriftHiveMetastore.java:374)
>>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.get_database(ThriftHiveMetastore.java:361)
>>         at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getDatabase(HiveMetaStoreClient.java:705)
>>         at org.apache.hadoop.hive.ql.metadata.Hive.getDatabase(Hive.java:1077)
>>         at org.apache.hadoop.hive.ql.metadata.Hive.databaseExists(Hive.java:1066)
>>         at org.apache.hadoop.hive.ql.exec.DDLTask.showTables(DDLTask.java:2004)
>>         at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:325)
>>         at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:134)
>>         at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57)
>>         at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1329)
>>         at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1115)
>>         at org.apache.hadoop.hive.ql.Driver.run(Driver.java:948)
>>         at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:259)
>>         at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:216)
>>         at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:412)
>>         at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:750)
>>         at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:613)
>>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>         at java.lang.reflect.Method.invoke(Method.java:597)
>>         at org.apache.hadoop.util.RunJar.main(RunJar.java:186)
>>
>> --travis
>>
>>
>> On Wed, Aug 1, 2012 at 11

The two setup options are:

cli->thriftmetastore->jdbc

cli->jdbc (used to be called local mode)

localmode has less moving parts so I prefer it.

On Wed, Aug 1, 2012 at 2:54 PM, Travis Crawford
<[EMAIL PROTECTED]> wrote:
> Oh interesting - you're saying instead of running a single
> HiveMetaStore thrift service, most users use the embedded
> HiveMetaStore mode and have each CLI instance connect to the DB
> directly?
>
> --travis
>
>
> On Wed, Aug 1, 2012 at 11:47 AM, Edward Capriolo <[EMAIL PROTECTED]> wrote:
>> I feel that that interface is very rarely used in the wild. The only
>> use case I can figure out for it is people with very in depth hive
>> experience that do not wish to interact with hive through the QL
>> language. That being said I would think the coverage might be a little
>> weak there. With the local metastore users have data nucleus providing
>> support for reconnection etc.
>>
>> On Wed, Aug 1, 2012 at 2:35 PM, Travis Crawford
>> <[EMAIL PROTECTED]> wrote:
>>> I'm using the thrift metastore via TFramedTransport. What value do you
>>> specify for hive.metastore.client.socket.timeout? I'm using 60.
>>>
>>> If I open the CLI, run "show tables", wait the timeout period, then
>>> run "show tables" the CLI hangs in:
>>>
>>> "main" prio=10 tid=0x000000004151a000 nid=0x448 runnable [0x0000000041b42000]
>>>    java.lang.Thread.State: RUNNABLE
>>>         at java.net.SocketInputStream.socketRead0(Native Method)
>>>         at java.net.SocketInputStream.read(SocketInputStream.java:129)
>>>         at org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:127)
>>>         at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
>>>         at org.apache.thrift.transport.TFramedTransport.readFrame(TFramedTransport.java:129)
>>>         at org.apache.thrift.transport.TFramedTransport.read(TFramedTransport.java:101)
>>>         at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
>>>         at org.apache.thrift.protocol.TBinaryProtocol.readAll(TBinaryProtocol.java:378)
>>>         at org.apache.thrift.protocol.TBinaryProtocol.readI32(TBinaryProtocol.java:297)
>>>         at org.apache.thrift.protocol.TBinaryProtocol.readMessageBegin(TBinaryProtocol.java:204)
>>>         at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:69)
>>>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.recv_get_database(ThriftHiveMetastore.java:374)
>>>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.get_database(ThriftHiveMetastore.java:361)
>>>         at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getDatabase(HiveMetaStoreClient.java:705)
>>>         at org.apache.hadoop.hive.ql.metadata.Hive.getDatabase(Hive.java:1077)
>>>         at org.apache.hadoop.hive.ql.metadata.Hive.databaseExists(Hive.java:1066)
>>>         at org.apache.hadoop.hive.ql.exec.DDLTask.showTables(DDLTask.java:2004)
>>>         at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:325)
>>>         at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:134)
>>>         at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57)
>>>         at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1329)
>>>         at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1115)
>>>         at org.apache.hadoop.hive.ql.Driver.run(Driver.java:948)
>>>         at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:259)
>>>         at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:216)
>>>         at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:412)
>>>         at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:750)
>>>         at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:613)
>>>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

Interesting - this issue would certainly go away with local mode as
there's no thrift call to fail. I'd very much prefer to run HMS as a
centralized service though.

Thanks for the info - I'll have to take a look at how the thrift
client handles timeouts/reconnects/etc.

--travis
On Wed, Aug 1, 2012 at 11:57 AM, Edward Capriolo <[EMAIL PROTECTED]> wrote:
> The two setup options are:
>
> cli->thriftmetastore->jdbc
>
> cli->jdbc (used to be called local mode)
>
> localmode has less moving parts so I prefer it.
>
> On Wed, Aug 1, 2012 at 2:54 PM, Travis Crawford
> <[EMAIL PROTECTED]> wrote:
>> Oh interesting - you're saying instead of running a single
>> HiveMetaStore thrift service, most users use the embedded
>> HiveMetaStore mode and have each CLI instance connect to the DB
>> directly?
>>
>> --travis
>>
>>
>> On Wed, Aug 1, 2012 at 11:47 AM, Edward Capriolo <[EMAIL PROTECTED]> wrote:
>>> I feel that that interface is very rarely used in the wild. The only
>>> use case I can figure out for it is people with very in depth hive
>>> experience that do not wish to interact with hive through the QL
>>> language. That being said I would think the coverage might be a little
>>> weak there. With the local metastore users have data nucleus providing
>>> support for reconnection etc.
>>>
>>> On Wed, Aug 1, 2012 at 2:35 PM, Travis Crawford
>>> <[EMAIL PROTECTED]> wrote:
>>>> I'm using the thrift metastore via TFramedTransport. What value do you
>>>> specify for hive.metastore.client.socket.timeout? I'm using 60.
>>>>
>>>> If I open the CLI, run "show tables", wait the timeout period, then
>>>> run "show tables" the CLI hangs in:
>>>>
>>>> "main" prio=10 tid=0x000000004151a000 nid=0x448 runnable [0x0000000041b42000]
>>>>    java.lang.Thread.State: RUNNABLE
>>>>         at java.net.SocketInputStream.socketRead0(Native Method)
>>>>         at java.net.SocketInputStream.read(SocketInputStream.java:129)
>>>>         at org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:127)
>>>>         at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
>>>>         at org.apache.thrift.transport.TFramedTransport.readFrame(TFramedTransport.java:129)
>>>>         at org.apache.thrift.transport.TFramedTransport.read(TFramedTransport.java:101)
>>>>         at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
>>>>         at org.apache.thrift.protocol.TBinaryProtocol.readAll(TBinaryProtocol.java:378)
>>>>         at org.apache.thrift.protocol.TBinaryProtocol.readI32(TBinaryProtocol.java:297)
>>>>         at org.apache.thrift.protocol.TBinaryProtocol.readMessageBegin(TBinaryProtocol.java:204)
>>>>         at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:69)
>>>>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.recv_get_database(ThriftHiveMetastore.java:374)
>>>>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.get_database(ThriftHiveMetastore.java:361)
>>>>         at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getDatabase(HiveMetaStoreClient.java:705)
>>>>         at org.apache.hadoop.hive.ql.metadata.Hive.getDatabase(Hive.java:1077)
>>>>         at org.apache.hadoop.hive.ql.metadata.Hive.databaseExists(Hive.java:1066)
>>>>         at org.apache.hadoop.hive.ql.exec.DDLTask.showTables(DDLTask.java:2004)
>>>>         at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:325)
>>>>         at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:134)
>>>>         at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57)
>>>>         at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1329)
>>>>         at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1115)
>>>>         at org.apache.hadoop.hive.ql.Driver.run(Driver.java:948)
>>>>         at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:259)
>>>>         at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:216)