Failed to get local hostname java.net.UnknownHostException: centos-ami: centos-ami: Name or service not known

[root@centos-ami riak-data-migrator-0.2.5]# ../jdk1.7.0_51/bin/java -jar riak-data-migrator-0.2.5.jar -h 10.46.100.10 -p 8081 -H 8071 -r ~ -b products -d
Destination PB Port not specified, using the default: 8087
09:38:53,941 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy]
09:38:53,941 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml]
09:38:53,942 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/root/riak-data-migrator-0.2.5/conf/logback.xml]
09:38:54,362 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set
09:38:54,480 |-ERROR in ch.qos.logback.core.util.ContextUtil@64cf5b3 - Failed to get local hostname java.net.UnknownHostException: centos-ami: centos-ami: Name or service not known
        at java.net.UnknownHostException: centos-ami: centos-ami: Name or service not known
        at      at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
        at      at ch.qos.logback.core.util.ContextUtil.getLocalHostName(ContextUtil.java:32)
        at      at ch.qos.logback.core.util.ContextUtil.addHostNameAsProperty(ContextUtil.java:41)
        at      at ch.qos.logback.classic.joran.action.ConfigurationAction.begin(ConfigurationAction.java:56)
        at      at ch.qos.logback.core.joran.spi.Interpreter.callBeginAction(Interpreter.java:276)
        at      at ch.qos.logback.core.joran.spi.Interpreter.startElement(Interpreter.java:148)
        at      at ch.qos.logback.core.joran.spi.Interpreter.startElement(Interpreter.java:130)
        at      at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:50)
        at      at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:157)
        at      at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:143)
        at      at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:106)
        at      at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:56)
        at      at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:75)
        at      at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:148)
        at      at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:85)
        at      at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:55)
        at      at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128)
        at      at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:107)
        at      at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:295)
        at      at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:269)
        at      at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:281)
        at      at com.basho.proserv.datamigrator.riak.Connection.<init>(Connection.java:21)
        at      at com.basho.proserv.datamigrator.Main.runDumper(Main.java:378)
        at      at com.basho.proserv.datamigrator.Main.main(Main.java:96)
Caused by: java.net.UnknownHostException: centos-ami: Name or service not known
        at      at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
        at      at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
        at      at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
        at      at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
        at      ... 23 common frames omitted
09:38:54,481 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
09:38:54,494 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [STDOUT]
09:38:54,643 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
09:38:54,863 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.FileAppender]
09:38:54,866 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [FILE]
09:38:54,872 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
09:38:54,873 |-INFO in ch.qos.logback.core.FileAppender[FILE] - File property is set to [log/riak-data-migrator-error.log]
09:38:54,875 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.FileAppender]
09:38:54,875 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [STATUS]
09:38:54,939 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
09:38:54,940 |-INFO in ch.qos.logback.core.FileAppender[STATUS] - File property is set to [log/riak-data-migrator-status.log]
09:38:54,942 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [status] to INFO
09:38:54,942 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting additivity of logger [status] to false
09:38:54,942 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [STATUS] to Logger[status]
09:38:54,943 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to ERROR
09:38:54,943 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [FILE] to Logger[ROOT]
09:38:54,943 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
09:38:54,947 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@2c6d1158 - Registering current configuration as safe fallback point

this long message shouldn't be there, the job gets done (the dump happens correctly, but each time I issue riak-data-migrator I get this printed), but I don't know why it's printed, it might be an error.

This looks like a logging configuration error. The logger prints to stdout because of the failure. Can you reply with the contents of your conf/logback.xml file. Thanks.

On Mon, Feb 10, 2014 at 9:43 AM, Pentium10 notifications@github.com wrote:

[root@centos-ami riak-data-migrator-0.2.5]# ../jdk1.7.0_51/bin/java -jar riak-data-migrator-0.2.5.jar -h 10.46.100.10 -p 8081 -H 8071 -r ~ -b products -d Destination PB Port not specified, using the default: 8087 09:38:53,941 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy] 09:38:53,941 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml] 09:38:53,942 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/root/riak-data-migrator-0.2.5/conf/logback.xml] 09:38:54,362 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set 09:38:54,480 |-ERROR in ch.qos.logback.core.util.ContextUtil@64cf5b3 - Failed to get local hostname java.net.UnknownHostException: centos-ami: centos-ami: Name or service not known at java.net.UnknownHostException: centos-ami: centos-ami: Name or service not known at at java.net.InetAddress.getLocalHost(InetAddress.java:1473) at at ch.qos.logback.core.util.ContextUtil.getLocalHostName(ContextUtil.java:32) at at ch.qos.logback.core.util.ContextUtil.addHostNameAsProperty(ContextUtil.java:41) at at ch.qos.logback.classic.joran.action.ConfigurationAction.begin(ConfigurationAction.java:56) at at ch.qos.logback.core.joran.spi.Interpreter.callBeginAction(Interpreter.java:276) at at ch.qos.logback.core.joran.spi.Interpreter.startElement(Interpreter.java:148) at at ch.qos.logback.core.joran.spi.Interpreter.startElement(Interpreter.java:130) at at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:50) at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:157) at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:143) at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:106) at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:56) at at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:75) at at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:148) at at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:85) at at org.slf4j.impl.StaticLoggerBinder.(StaticLoggerBinder.java:55) at at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128) at at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:107) at at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:295) at at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:269) at at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:281) at at com.basho.proserv.datamigrator.riak.Connection.(Connection.java:21) at at com.basho.proserv.datamigrator.Main.runDumper(Main.java:378) at at com.basho.proserv.datamigrator.Main.main(Main.java:96) Caused by: java.net.UnknownHostException: centos-ami: Name or service not known at at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) at at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901) at at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293) at at java.net.InetAddress.getLocalHost(InetAddress.java:1469) at ... 23 common frames omitted 09:38:54,481 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender] 09:38:54,494 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [STDOUT] 09:38:54,643 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property 09:38:54,863 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.FileAppender] 09:38:54,866 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [FILE] 09:38:54,872 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property 09:38:54,873 |-INFO in ch.qos.logback.core.FileAppender[FILE] - File property is set to [log/riak-data-migrator-error.log] 09:38:54,875 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.FileAppender] 09:38:54,875 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [STATUS] 09:38:54,939 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property 09:38:54,940 |-INFO in ch.qos.logback.core.FileAppender[STATUS] - File property is set to [log/riak-data-migrator-status.log] 09:38:54,942 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [status] to INFO 09:38:54,942 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting additivity of logger [status] to false 09:38:54,942 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [STATUS] to Logger[status] 09:38:54,943 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to ERROR 09:38:54,943 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [FILE] to Logger[ROOT] 09:38:54,943 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration. 09:38:54,947 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@2c6d1158 - Registering current configuration as safe fallback point

this long message shouldn't be there, the job gets done (the dump happens correctly, but each time I issue riak-data-migrator I get this printed), but I don't know why it's printed, it might be an error.

Reply to this email directly or view it on GitHubhttps://github.com/basho/riak-data-migrator/issues/7 .

[root@centos-ami conf]# cat logback.xml
<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="false">

        <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <!-- encoders are assigned the type
             ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
                <encoder>
                        <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{5} - %msg%n</pattern>
                </encoder>
        </appender>

        <appender name="FILE" class="ch.qos.logback.core.FileAppender">
                <file>log/riak-data-migrator-error.log</file>
                <append>false</append>
                <encoder>
                        <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
                </encoder>
        </appender>

        <appender name="STATUS" class="ch.qos.logback.core.FileAppender">
                <file>log/riak-data-migrator-status.log</file>
                <append>false</append>
                <encoder>
                        <pattern>%msg%n</pattern>
                </encoder>
        </appender>

        <logger name="status" level="INFO" additivity="false">
                <appender-ref ref="STATUS" />
        </logger>

        <!-- Strictly speaking, the level attribute is not necessary since -->
        <!-- the level of the root level is set to DEBUG by default.       -->
        <root level="ERROR">
                <appender-ref ref="FILE" />
        </root>

</configuration>

I don't remember modifying this, so it might exactly what we have downloaded from your link.

You're correct that the log file configuration is the default. I should have noticed that it's the call java.net.InetAddress.getLocalHost() that is failing. It appears that your machine hostname, centos-ami, is not resolving via DNS [http://holtstrom.com/michael/blog/post/401/Hostname-in-Amazon-Linux.html]. You can try adding it to your hosts file to resolve your issue quickly [http://stackoverflow.com/questions/1881546/inetaddress-getlocalhost-throws-unknownhostexception]. I am closing this issue since it's related to your environment and tangentially, the logback library, versus this program.

On Mon, Feb 10, 2014 at 11:40 AM, Pentium10 notifications@github.comwrote:

[root@centos-ami conf]# cat logback.xml <?xml version="1.0" encoding="UTF-8"?>
``` %d{HH:mm:ss.SSS} [%thread] %-5level %logger{5} - %msg%n log/riak-data-migrator-error.log false %d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n log/riak-data-migrator-status.log false %msg%n ```
I don't remember modifying this, so it might exactly what we have downloaded from your link.

Reply to this email directly or view it on GitHubhttps://github.com/basho/riak-data-migrator/issues/7#issuecomment-34652261 .

I don't agree.

The script should support machines where the hostname is not set. And this is not something I should quickly resolve as we have a farm of machines, and they are auto-scaling. Instances die, and they are respawn with others, we don't have hostnames for all these, as it's a big thing to accomplish on every machine. Instead we use the tags, and other IP related management to identify our machines.

The issue is, that the message itself spams our logs, and we get alerted by email/sms because the output itself has the ERROR keyword. So I think this can be serious and not cataloged to some environment flaw. What do you think?

If the error were something that could be handled in riak-data-migrator, I would agree, but the issue is with the underlying logging library, so I don't.

The options are:

Switch logging libraries to one that doesn't attempt to use java.net.InetAddress.getLocalHost(). Feel free to submit a PR.
Log an issue with the logback folks. A quick google search shows that this is an issue that has come up before and they opted not to fix it.
Try Java 8. I also found a link that said the exception thrown by java.net.InetAddress.getLocalHost() is a Java bug and it may have been resolved/behave differently in that environment.

It sounds like you might be deploying riak-data-migrator to machines in an auto-scale environment. This does not fit the development assistance scope of the program. It's primarily intended to be run from a single machine against an existing Riak cluster. In this case, I don't believe it's too much trouble to add your hostname to your hosts file once [echo "127.0.0.1 $(hostname -s)" >> /etc/hosts].

On Mon, Feb 10, 2014 at 12:55 PM, Pentium10 notifications@github.comwrote:

I don't agree.

The script should support machines where the hostname is not set. And this is not something I should quickly resolve as we have a farm of machines, and they are auto-scaling. Instances die, and they are respawn with others, we don't have hostnames for all these, as it's a big thing to accomplish on every machine. Instead we use the tags, and other IP related management to identify our machines.

The issue is, that the message itself spams our logs, and we get alerted by email/sms because the output itself has the ERROR keyword. So I think this can be serious and not cataloged to some environment flaw. What do you think?

Reply to this email directly or view it on GitHubhttps://github.com/basho/riak-data-migrator/issues/7#issuecomment-34660785 .

basho-labs / riak-data-migrator

Failed to get local hostname java.net.UnknownHostException: centos-ami: centos-ami: Name or service not known #7