TestScannerTimeoutHandling (Apache HBase 2.5.0 Test API)

java.lang.Object
- org.apache.hadoop.hbase.regionserver.TestScannerTimeoutHandling

public class TestScannerTimeoutHandling
extends Object

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`private static class`	`TestScannerTimeoutHandling.RegionServerWithScanTimeout`
`private static class`	`TestScannerTimeoutHandling.RSRpcServicesWithScanTimeout`

Field Summary

Fields
Modifier and Type	Field and Description
`static HBaseClassTestRule`	`CLASS_RULE`
`private static org.apache.hadoop.hbase.client.Connection`	`CONN`
`private static org.slf4j.Logger`	`LOG`
`private static MetricsAssertHelper`	`METRICS_ASSERT`
`org.junit.rules.TestName`	`name`
`private static org.apache.hadoop.hbase.TableName`	`TABLE_NAME`
`private static HBaseTestingUtility`	`TEST_UTIL`
`private static int`	`TIMEOUT`

Constructor Summary

Constructors
Constructor and Description

TestScannerTimeoutHandling()

Constructors
Constructor and Description
`TestScannerTimeoutHandling()`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`setUpBeforeClass()`
`static void`	`tearDownAfterClass()`
`void`	`testExceededClientDeadline()` If a client's timeout would be exceeded before scan results are ready, there is no point returning results to the client.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - LOG
```
private static final org.slf4j.Logger LOG
```
  - CLASS_RULE
```
public static final HBaseClassTestRule CLASS_RULE
```
  - TEST_UTIL
```
private static final HBaseTestingUtility TEST_UTIL
```
  - METRICS_ASSERT
```
private static final MetricsAssertHelper METRICS_ASSERT
```
  - TIMEOUT
```
private static final int TIMEOUT
```
    See Also:
    
    Constant Field Values
  - TABLE_NAME
```
private static final org.apache.hadoop.hbase.TableName TABLE_NAME
```
  - CONN
```
private static org.apache.hadoop.hbase.client.Connection CONN
```
  - name
```
public org.junit.rules.TestName name
```
- Constructor Detail
  - TestScannerTimeoutHandling
```
public TestScannerTimeoutHandling()
```
- Method Detail
  - setUpBeforeClass
```
public static void setUpBeforeClass()
                             throws Exception
```
    Throws:
    
    Exception
  - tearDownAfterClass
```
public static void tearDownAfterClass()
                               throws Exception
```
    Throws:
    
    Exception
  - testExceededClientDeadline
```
public void testExceededClientDeadline()
                                throws Exception
```
    If a client's timeout would be exceeded before scan results are ready, there is no point returning results to the client. Worse, for openScanner calls, the client cannot close the timed out scanner so this leaks scanners on the server. This test verifies that we properly track and cleanup scanners when a client timeout is exceeded. This should be more rare when heartbeats are enabled, since we try to return before timeout there. But it's still possible if queueing eats up most of the timeout or the inner workings of the scan were slowed down enough to still exceed the timeout despite the calculated heartbeat deadline.
    
    Throws:
    
    Exception

Class TestScannerTimeoutHandling

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

LOG

CLASS_RULE

TEST_UTIL

METRICS_ASSERT

TIMEOUT

TABLE_NAME

CONN

name

Constructor Detail

TestScannerTimeoutHandling

Method Detail

setUpBeforeClass

tearDownAfterClass

testExceededClientDeadline