Monitoring Spring boot application(TestMonitoring) using JMX exporter and Prometheus. Prometheus and spring boot application Pods are up and running in kubernetes cluster.
Now the pain is to get JMX exporter running and the application should expose metrics via JMX.
In TestMonitoring application , the application.properties file has the following setting:
endpoints.jmx.enabled=true
spring.jmx.enabled=true
Now how to install the JMX exporter as an agent:
i have download the jar and executed:
java -javaagent:./jmx_prometheus_javaagent-0.9.jar=1234:config.yml
In the config.yml -> the following hostPort:xx.x.x.x:30001 (target port of myspring boot application which is available as a service)
The following exception is thrown:
Sep 22, 2017 4:12:31 PM
io.prometheus.jmx.shaded.io.prometheus.jmx.JmxCollector collect
SEVERE: JMX scrape failed: java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.CommunicationException [R oot exception is java.rmi.ConnectIOException: non-JRMP server at remote endpoint]
at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:370)
at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:268)
at io.prometheus.jmx.shaded.io.prometheus.jmx.JmxScraper.doScrape(JmxScraper.java:106)
at io.prometheus.jmx.shaded.io.prometheus.jmx.JmxCollector.collect(JmxCollector.java:401)
at io.prometheus.jmx.shaded.io.prometheus.client.CollectorRegistry.collectorNames(CollectorRegistry.java:99)
at io.prometheus.jmx.shaded.io.prometheus.client.CollectorRegistry.register(CollectorRegistry.java:50)
at io.prometheus.jmx.shaded.io.prometheus.client.Collector.register(Collector.java:128)
at io.prometheus.jmx.shaded.io.prometheus.client.Collector.register(Collector.java:121)
at io.prometheus.jmx.shaded.io.prometheus.jmx.JavaAgent.premain(JavaAgent.java:38)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:382)
at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:397)
Caused by: javax.naming.CommunicationException [Root exception is java.rmi.ConnectIOException: non-JRMP server at remote endpoint]
at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:142)
at com.sun.jndi.toolkit.url.GenericURLContext.lookup(GenericURLContext.java:204)
at javax.naming.InitialContext.lookup(InitialContext.java:415)
at javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(RMIConnector.java:1928)
at javax.management.remote.rmi.RMIConnector.findRMIServer(RMIConnector.java:1895)
at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:287)
What could be the reason of the such exception,Just not able to figure it? any suggestions will be very helpful
Try https://github.com/fabric8io/agent-bond
It works fine.
Use it like this:
-javaagent:/opt/agent-bond/agent-bond.jar=/etc/config/agent-bond.properties
Related
I have a quarkus app connecting to a MySQL database.
I use the generated Dockerfile.jvm to build my docker image. And I have no issue to run this image on my local desktop.
However when I want to run the same image on my vm, I have the following stacktrace:
Caused by: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:197)
at io.agroal.pool.ConnectionFactory.createConnection(ConnectionFactory.java:200)
at io.agroal.pool.ConnectionPool$CreateConnectionTask.call(ConnectionPool.java:419)
at io.agroal.pool.ConnectionPool$CreateConnectionTask.call(ConnectionPool.java:401)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at io.agroal.pool.util.PriorityScheduledExecutor.beforeExecute(PriorityScheduledExecutor.java:65)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1126)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167)
at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:334)
at com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:164)
at com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol.java:1342)
at com.mysql.cj.NativeSession.connect(NativeSession.java:157)
at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:956)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)
... 11 more
Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
at java.base/sun.security.ssl.HandshakeContext.<init>(HandshakeContext.java:171)
at java.base/sun.security.ssl.ClientHandshakeContext.<init>(ClientHandshakeContext.java:98)
at java.base/sun.security.ssl.TransportContext.kickstart(TransportContext.java:222)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:433)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:411)
at com.mysql.cj.protocol.ExportControlled.performTlsHandshake(ExportControlled.java:336)
at com.mysql.cj.protocol.StandardSocketFactory.performTlsHandshake(StandardSocketFactory.java:188)
at com.mysql.cj.protocol.a.NativeSocketConnection.performTlsHandshake(NativeSocketConnection.java:99)
at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:325)
... 16 more
I have no idea about how to solve this issue. Any help would be very appreciated.
I solved my problem with replacing the original Dockerfile.jvm content by the following one:
FROM openjdk:11-jdk-slim
COPY target/lib/* lib/
COPY target/*.jar app.jar
ENTRYPOINT ["java","-jar","/app.jar"]
This maybe create heavier image, but at least this is always working.
Just stumbled into this;
My quarkus container in running in ubi8 (rhel8) and connecting to mysql 5.7
https://access.redhat.com/documentation/en-us/red_hat_support_for_spring_boot/2.1/html/release_notes_for_spring_boot_2.1/known-issues-spring-boot
Just modify mysql jdbc url to "useSSL=true&enabledTLSProtocols=TLSv1.2"
It's been a week since I tried to deploy this solution locally on my machine and then deploy it to a production server.
However, I faced many difficulties and incomprehension, that is what I did:
Sonar installation via apt-get and launch of it on port 9000 of localhost.
Installation of Jenkins via apt-get and launch of it on port 8080 of localhost.
Download the Sonar plugin for Jenkins.
After trying to running a job, it failed because :
ERROR: Error during SonarQube Scanner execution org.sonarqube.ws.client.HttpException:
The full error stack is:
ERROR: Error during SonarQube Scanner execution
org.sonarqube.ws.client.HttpException: Error 500 on http:/localhost:9000/api/ce/submit?projectKey=sonar.org:projectname&projectName=devops : {"errors":[{"msg":"An error has occurred. Please contact your administrator"}]}
at org.sonarqube.ws.client.BaseResponse.failIfNotSuccessful(BaseResponse.java:36)
at org.sonar.scanner.bootstrap.ScannerWsClient.failIfUnauthorized(ScannerWsClient.java:106)
at org.sonar.scanner.bootstrap.ScannerWsClient.call(ScannerWsClient.java:75)
at org.sonar.scanner.report.ReportPublisher.upload(ReportPublisher.java:177)
at org.sonar.scanner.report.ReportPublisher.execute(ReportPublisher.java:131)
at org.sonar.scanner.phases.PublishPhaseExecutor.publishReportJob(PublishPhaseExecutor.java:72)
at org.sonar.scanner.phases.PublishPhaseExecutor.executeOnRoot(PublishPhaseExecutor.java:54)
at org.sonar.scanner.phases.AbstractPhaseExecutor.execute(AbstractPhaseExecutor.java:83)
at org.sonar.scanner.scan.ModuleScanContainer.doAfterStart(ModuleScanContainer.java:175)
at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:143)
at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:128)
at org.sonar.scanner.scan.ProjectScanContainer.scan(ProjectScanContainer.java:262)
at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:257)
at org.sonar.scanner.scan.ProjectScanContainer.doAfterStart(ProjectScanContainer.java:247)
at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:143)
at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:128)
at org.sonar.scanner.task.ScanTask.execute(ScanTask.java:47)
at org.sonar.scanner.task.TaskContainer.doAfterStart(TaskContainer.java:86)
at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:143)
at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:128)
at org.sonar.scanner.bootstrap.GlobalContainer.executeTask(GlobalContainer.java:118)
at org.sonar.batch.bootstrapper.Batch.executeTask(Batch.java:117)
at org.sonarsource.scanner.api.internal.batch.BatchIsolatedLauncher.execute(BatchIsolatedLauncher.java:63)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.sonarsource.scanner.api.internal.IsolatedLauncherProxy.invoke(IsolatedLauncherProxy.java:60)
at com.sun.proxy.$Proxy0.execute(Unknown Source)
at org.sonarsource.scanner.api.EmbeddedScanner.doExecute(EmbeddedScanner.java:233)
at org.sonarsource.scanner.api.EmbeddedScanner.runAnalysis(EmbeddedScanner.java:151)
at org.sonarsource.scanner.cli.Main.runAnalysis(Main.java:123)
at org.sonarsource.scanner.cli.Main.execute(Main.java:77)
at org.sonarsource.scanner.cli.Main.main(Main.java:61)
http://localhost:9000/api/ce/submit?projectKey=sonar.org:projectname&projectName=devops
: {"errors":[{"msg":"An error has occurred. Please contact your administrator"}]}
When I searched on the SonarQube logs I saw that :
2017.05.02 23:35:25 ERROR web[AVvKZ3JA+DB4lMWaAACV][o.s.s.w.WebServiceEngine] Fail to process
request http:/localhost:9000/api/qualityprofiles/restore
java.lang.IllegalStateException: Can't read file part at
org.sonar.server.ws.ServletRequest.readPart(ServletRequest.java:102)
...
Caused by: java.io.IOException: The temporary upload location [/root/Documents/sonarqube-6.3.1/temp/tc/work/Tomcat/localhost/ROOT] is not valid
As seen in "The temporary upload location is not valid", make sure that the folder /root/Documents/sonarqube-6.3.1/temp/tc/work/Tomcat/localhost/ROOT
does exist
is 775 by the user running Sonar.
Or (as seen here) you can define the temporary folder to another location
JVM_OPTIONS="-Xrs -Xms256m -Xmx512m -Djava.io.tmpdir=/opt/another/tmp"
See this thread and this thread as examples.
I get a NullPointerException every now and then in my Embedded Jetty application:
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.jetty.jmx.ObjectMBean.getAttribute(ObjectMBean.java:349)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:647)
at com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:678)
at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1445)
...
Caused by: java.lang.NullPointerException
at org.eclipse.jetty.server.handler.ContextHandler.isShutdown(ContextHandler.java:682)
... 28 more
I have set up JMX like this:
Server server = new Server();
MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
MBeanContainer mbContainer = new MBeanContainer(mBeanServer);
server.addBean(mbContainer);
This happens randomly (not always) at server startup and only if I have my Prometheous JMX Exporter running on the same machine, most likely connecting to the JMX server at a phase when Jetty is not quite ready to handle the connection.
Any ideas how to fix this?
The JMX exporter should be gracefully handling the error, so you shouldn't have to worry on the JMX side.
Looking at the jetty code, that's just a synchronised accessor so I don't see how you can get an NPE out of it. Presumably the object is null, so this is likely worth filing a bug against jetty.
I installed neo4j 2.0.0 M06 version on my Ubuntu pc. It service worked fine, and I could use the new web browser perfectly.
Then, I used the sample java project (https://github.com/neo4j/neo4j/blob/2.0.0-M06/community/embedded-examples/src/main/java/org/neo4j/examples/EmbeddedNeo4jWithIndexing.java) to connect embedded way to the DB and add some nodes. (btw, I'm sure I stopped the neo4j service before launching the java application)
I changed the number of nodes added by the program to 100,000, and the application crashed on exceeding heap size (GC overhead limit).
Now, when trying to launch the neo4j I get a startup error :
2013-11-01 09:53:13.806+0000 DEBUG [API] Failed to start Neo Server on port [7474]
2013-11-01 10:00:52.865+0000 INFO [API] Setting startup timeout to: 120000ms based on -1
2013-11-01 10:00:52.998+0000 DEBUG [API]
org.neo4j.server.ServerStartupException: Starting Neo4j Server failed: org/neo4j/helpers /Settings
at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:193) ~[neo4j- server-2.0.0-M06.jar:2.0.0-M06]
at org.neo4j.server.Bootstrapper.start(Bootstrapper.java:87) [neo4j-server-2.0.0- M06.jar:2.0.0-M06]
at org.neo4j.server.Bootstrapper.main(Bootstrapper.java:50) [neo4j-server-2.0.0- M06.jar:2.0.0-M06]
Caused by: java.lang.NoClassDefFoundError: org/neo4j/helpers/Settings
at org.neo4j.shell.ShellSettings.<clinit>(ShellSettings.java:42) ~[neo4j-shell- 2.0.0-M06.jar:2.0.0-M06]
at org.neo4j.server.database.CommunityDatabase.getDbTuningPropertiesWithServerDefaults(Communit yDatabase.java:106) ~[neo4j-server-2.0.0-M06.jar:2.0.0-M06]
at org.neo4j.server.enterprise.EnterpriseDatabase.start(EnterpriseDatabase.java:89) ~[neo4j-server-enterprise-2.0.0-M06.jar:2.0.0-M06]
at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:141) ~[neo4j- server-2.0.0-M06.jar:2.0.0-M06]
... 2 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.neo4j.helpers.Settings
at java.net.URLClassLoader$1.run(URLClassLoader.java:366) ~[na:1.7.0_45]
at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[na:1.7.0_45]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_45]
at java.net.URLClassLoader.findClass(URLClassLoader.java:354) ~[na:1.7.0_45]
at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[na:1.7.0_45]
at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[na:1.7.0_45]
... 6 common frames omitted
2013-11-01 10:00:53.000+0000 DEBUG [API] Failed to start Neo Server on port [7474]
I found the problem with the jar files. Unfortunately, after solving the jar files problem, I had to reinstall neo4j for the service to work again
I'm trying access our TFS server when VPN'd from home but it only gives me the following message:
Connecting to TFS...
git-tf: Permission denied: connect
I'm using a fully qualified URL and everything else works just fine over the VPN. Are there any authentication config settings I could try? I can't find mention of anything online anywhere.
And of course when I'm in the office it works just fine.
EDIT - Stack trace from logs
2012-10-12 10:07:31,231 INFO [main] (com.microsoft.tfs.core.config.httpclient.DefaultHTTPClientFactory) HttpClient configured for http://svrtfs2010.ms.innovativesol.com:8080/tfs/DefaultCollection, authenticating as innovative/jrusso
2012-10-12 10:07:31,535 INFO [main] (com.microsoft.tfs.core.httpclient.HttpMethodDirector) I/O exception (java.net.SocketException) caught when processing request: Permission denied: connect
2012-10-12 10:07:31,535 INFO [main] (com.microsoft.tfs.core.httpclient.HttpMethodDirector) Retrying request
2012-10-12 10:07:31,535 INFO [main] (com.microsoft.tfs.core.httpclient.HttpMethodDirector) I/O exception (java.net.SocketException) caught when processing request: Permission denied: connect
2012-10-12 10:07:31,535 INFO [main] (com.microsoft.tfs.core.httpclient.HttpMethodDirector) Retrying request
2012-10-12 10:07:31,535 INFO [main] (com.microsoft.tfs.core.httpclient.HttpMethodDirector) I/O exception (java.net.SocketException) caught when processing request: Permission denied: connect
2012-10-12 10:07:31,535 INFO [main] (com.microsoft.tfs.core.httpclient.HttpMethodDirector) Retrying request
2012-10-12 10:07:31,544 WARN [main] (git-tf) Error executing command: pull --deep --rebase
com.microsoft.tfs.core.exceptions.TECoreException: Permission denied: connect
at com.microsoft.tfs.core.exceptions.mappers.TECoreExceptionMapper.map(TECoreExceptionMapper.java:99)
at com.microsoft.tfs.core.exceptions.mappers.LocationExceptionMapper.map(LocationExceptionMapper.java:32)
at com.microsoft.tfs.core.clients.framework.location.internal.LocationWebServiceProxy.connect(LocationWebServiceProxy.java:76)
at com.microsoft.tfs.core.clients.framework.location.LocationService.connect(LocationService.java:754)
at com.microsoft.tfs.core.clients.framework.location.LocationService.ensureConnected(LocationService.java:884)
at com.microsoft.tfs.core.clients.framework.location.LocationService.ensureAuthenticated(LocationService.java:923)
at com.microsoft.tfs.core.TFSConnection.ensureAuthenticated(TFSConnection.java:739)
at com.microsoft.gittf.client.clc.commands.framework.Command.getConnection(Command.java:354)
at com.microsoft.gittf.client.clc.commands.framework.Command.getConnection(Command.java:326)
at com.microsoft.gittf.client.clc.commands.framework.Command.getVersionControlClient(Command.java:474)
at com.microsoft.gittf.client.clc.commands.framework.Command.getVersionControlService(Command.java:492)
at com.microsoft.gittf.client.clc.commands.PullCommand.run(PullCommand.java:140)
at com.microsoft.gittf.client.clc.Main.main(Main.java:319)
Caused by: com.microsoft.tfs.core.ws.runtime.exceptions.TransportException: Permission denied: connect
at com.microsoft.tfs.core.ws.runtime.client.SOAPService.executeSOAPRequestInternal(SOAPService.java:744)
at com.microsoft.tfs.core.ws.runtime.client.SOAPService.executeSOAPRequest(SOAPService.java:473)
at ms.ws._LocationWebServiceSoap12Service.connect(_LocationWebServiceSoap12Service.java:384)
at com.microsoft.tfs.core.clients.framework.location.internal.LocationWebServiceProxy.connect(LocationWebServiceProxy.java:70)
... 10 more
Caused by: java.net.SocketException: Permission denied: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at com.microsoft.tfs.core.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:147)
at com.microsoft.tfs.core.httpclient.HttpConnection.open(HttpConnection.java:862)
at com.microsoft.tfs.core.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.open(MultiThreadedHttpConnectionManager.java:1690)
at com.microsoft.tfs.core.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:495)
at com.microsoft.tfs.core.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:197)
at com.microsoft.tfs.core.httpclient.HttpClient.executeMethod(HttpClient.java:464)
at com.microsoft.tfs.core.httpclient.HttpClient.executeMethod(HttpClient.java:376)
at com.microsoft.tfs.core.ws.runtime.client.SOAPService.executeSOAPRequestInternal(SOAPService.java:588)
... 13 more
This is related to Java bug 703177. Java 7 brings IPv6 support, and Cisco's VPN client reportedly rejects IPv6 traffic. You can force Java to use IPv4 as its transit with the java.net.preferIPv4Stack system property.
You will need to edit the git-tf launcher scripts that start the JVM in order to do this. You can add the -Djava.net.preferIPv4Stack=true argument to the launch line in both git-tf and git-tf.cmd.
The last lines of git-tf should be:
exec java -Xmx512m -classpath "$GITTF_CLASSPATH" \
"-Dcom.microsoft.tfs.jni.native.base-directory=$BASE_DIRECTORY/native" \
-Djava.net.preferIPv4Stack=true \
com.microsoft.gittf.client.clc.Main "$#"
The 47th line of git-tf.cmd should be:
java -ea -Xmx512M -cp %GITTF_CLASSPATH% "-Dcom.microsoft.tfs.jni.native.base-directory=%BASE_DIRECTORY%native" -Djava.net.preferIPv4Stack=true com.microsoft.gittf.client.clc.Main %*