Package org.apache.hadoop.hbase

Class HealthChecker

java.lang.Object

org.apache.hadoop.hbase.HealthChecker

class HealthChecker
extends Object

A utility for executing an external script that checks the health of the node. An example script can be found at src/main/sh/healthcheck/healthcheck.sh in the hbase-examples module.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static enum	HealthChecker.HealthCheckerExitStatus

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	ERROR_PATTERN	Pattern used for searching in the output of the node health script
private String	exceptionStackTrace
private String	healthCheckScript
private static final org.slf4j.Logger	LOG
private long	scriptTimeout
private org.apache.hadoop.util.Shell.ShellCommandExecutor	shexec

Constructor Summary

Constructors

Constructor	Description
HealthChecker()

Method Summary

Modifier and Type	Method	Description
HealthReport	checkHealth()
private String	getHealthReport(HealthChecker.HealthCheckerExitStatus status)
private boolean	hasErrors(String output)
void	init(String location, long timeout)	Initialize.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

LOG

private static final org.slf4j.Logger LOG

shexec

private org.apache.hadoop.util.Shell.ShellCommandExecutor shexec

exceptionStackTrace

private String exceptionStackTrace

ERROR_PATTERN

private static final String ERROR_PATTERN

Pattern used for searching in the output of the node health script

See Also:

• Constant Field Values

healthCheckScript

private String healthCheckScript

scriptTimeout

private long scriptTimeout

Constructor Details

HealthChecker

HealthChecker()

Method Details

init

public void init(String location,
 long timeout)

Initialize.

Parameters:

location - the location of the health script

timeout - the timeout to be used for the health script

checkHealth

public HealthReport checkHealth()

hasErrors

private boolean hasErrors(String output)

getHealthReport

private String getHealthReport(HealthChecker.HealthCheckerExitStatus status)