Jgroups use "IP multicasting by default to send messages to all members (UDP) and for discovery of the initial members . However, if multicasting cannot be used, the UDP can be configured to send multiple unicast messages instead of one multicast message. To configure UDP to use multiple unicast messages to send a group message instead of using IP multicasting, the ip_mcast property has to be set to false." (as per jboss documentation https://developer.jboss.org/ )
My question is how can I pass "ip_mcast" value to false in wildfly? Below is the sample jgroups subsystem in the standalone-ha.xml. In the xsd I don't see a way to pass this value. Please help!!
<subsystem xmlns="urn:jboss:domain:jgroups:4.0">
<channels default="ee">
<channel name="ee" stack="udpgossip"/>
</channels>
<stacks>
<stack name="udpgossip">
<transport type="UDP" socket-binding="jgroups-tcp"/>
<protocol type="TCPGOSSIP">
<property name="initial_hosts">172.17.0.2[12001]</property>
</protocol>
<protocol type="MERGE3"/>
<protocol type="FD_SOCK" socket-binding="jgroups-tcp-fd"/>
<protocol type="FD"/>
<protocol type="VERIFY_SUSPECT"/>
<protocol type="pbcast.NAKACK2"/>
<protocol type="UNICAST3"/>
<protocol type="pbcast.STABLE"/>
<protocol type="pbcast.GMS"/>
<protocol type="MFC"/>
<protocol type="FRAG2"/>
</stack>
</stacks>
</subsystem>
In the schema, <transport/> extends <protocol/>, and protocols can have properties, as your config sample already shows. So the correct way to set it should be
<transport type="UDP" socket-binding="jgroups-tcp">
<property name="ip_mcast">false</property>
</transport>
Related
I'm trying to setup a cross-datacenter replication mode between two infinispans 9.4.x as per Keycloak documentation, but the thing is that I'm trying to do this in sligtly modified environment:
multicast doesn't work between DC for obvious reasons
I have to use the port 7601 because 7600 is already used on this host by Keycloak JGroups transport (yup, by it's internal infinispan, and my future question would be "why do I need to use external extra Infinispan instance instead of setiing up replication between internal Keycloak's Infinispans, but first things first).
These a parts of my config that I added/modified:
[...]
<replicated-cache-configuration name="sessions-cfg" mode="SYNC" start="EAGER" batching="false">
<backups>
<backup site="site2" failure-policy="FAIL" strategy="SYNC" enabled="true">
<take-offline after-failures="3" min-wait="60000"/>
</backup>
</backups>
<locking acquire-timeout="0"/>
</replicated-cache-configuration>
[...]
<subsystem xmlns="urn:infinispan:server:jgroups:9.4">
<channels default="infinicluster">
<channel name="infinicluster" stack="tcp"/>
<channel name="xsite" stack="tcp"/>
</channels>
<stacks default="${jboss.default.jgroups.stack:udp}">
<stack name="udp">
<transport type="UDP" socket-binding="jgroups-udp"/>
<protocol type="PING"/>
<protocol type="MERGE3"/>
<protocol type="FD_SOCK" socket-binding="jgroups-udp-fd"/>
<protocol type="FD_ALL"/>
<protocol type="VERIFY_SUSPECT"/>
<protocol type="pbcast.NAKACK2"/>
<protocol type="UNICAST3"/>
<protocol type="pbcast.STABLE"/>
<protocol type="pbcast.GMS"/>
<protocol type="UFC_NB"/>
<protocol type="MFC_NB"/>
<protocol type="FRAG3"/>
<relay site="site1">
<remote-site name="site2" channel="xsite"/>
</relay>
</stack>
<stack name="tcp">
<transport type="TCP" socket-binding="jgroups-tcp"/>
<protocol type="TCPPING">
<property name="initial_hosts">
host1.tld[7601],host2.tld[7601]
</property>
<property name="ergonomics">
false
</property>
</protocol>
<protocol type="MERGE3"/>
<protocol type="FD_SOCK" socket-binding="jgroups-tcp-fd"/>
<protocol type="FD_ALL"/>
<protocol type="VERIFY_SUSPECT"/>
<protocol type="pbcast.NAKACK2">
<property name="use_mcast_xmit">
false
</property>
Of course, I changed the port numbers in JGroups socket bindings accordingly.
Both instances seem to be starting okay (complaining only about rest https bindings, which seems to be a minor error), I can even see the communications between instances in the logs:
2020-05-06 23:28:54,713 INFO [org.infinispan.CLUSTER] (remote-thread--p2-t20)[Context=___hotRodTopologyCache]ISPN100002: Starting rebalance with members [host1.tld, host2.tld], phase READ_OLD_WRITE_ALL, topology id 2
2020-05-06 23:28:54,779 INFO [org.infinispan.CLUSTER] (remote-thread--p2-t2) [Context=___hotRodTopologyCache]ISPN100009: Advancing to rebalance phase READ_ALL_WRITE_ALL, topology id 3
2020-05-06 23:28:54,807 INFO [org.infinispan.CLUSTER] (remote-thread--p2-t21)[Context=___hotRodTopologyCache]ISPN100009: Advancing to rebalance phase READ_NEW_WRITE_ALL, topology id 4
2020-05-06 23:28:54,834 INFO [org.infinispan.CLUSTER] (remote-thread--p2-t4)[Context=___hotRodTopologyCache]ISPN100010: Finished rebalance with members [host1.tld,host2.tld], topology id 5
The main issue is, that as soon as I open the web management page of any of the instances, I get the error on the logs (suppose I open the management page from site1, host1.tld):
2020-05-06 23:30:49,057 ERROR [org.jboss.as.controller.management-operation] (External Management Request Threads -- 1) WFLYCTL0013: Operation ("read-attribute") failed - address: ([
("subsystem" => "datagrid-infinispan"),
("cache-container" => "clustered")]): java.lang.IllegalStateException: Site host2.tld not defined in all the cluster members
at org.infinispan.xsite.XSiteAdminOperations.clusterStatus(XSiteAdminOperations.java:78)
at org.infinispan.xsite.GlobalXSiteAdminOperations.globalStatus(GlobalXSiteAdminOperations.java:93)
at org.jboss.as.clustering.infinispan.subsystem.CacheContainerMetricsHandler.filterSitesByStatus(CacheContainerMetricsHandler.java:343)
at org.jboss.as.clustering.infinispan.subsystem.CacheContainerMetricsHandler.executeRuntimeStep(CacheContainerMetricsHandler.java:297)
at org.jboss.as.controller.AbstractRuntimeOnlyHandler$1.execute(AbstractRuntimeOnlyHandler.java:59)
at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:999)
at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:743)
at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:467)
at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1411)
at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:423)
at org.jboss.as.controller.ModelControllerImpl.lambda$execute$1(ModelControllerImpl.java:243)
at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:265)
at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:231)
at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:243)
at org.jboss.as.domain.http.server.DomainApiHandler.handleRequest(DomainApiHandler.java:212)
at io.undertow.server.handlers.encoding.EncodingHandler.handleRequest(EncodingHandler.java:72)
at org.jboss.as.domain.http.server.DomainApiCheckHandler.handleRequest(DomainApiCheckHandler.java:93)
at org.jboss.as.domain.http.server.security.ElytronIdentityHandler.lambda$handleRequest$0(ElytronIdentityHandler.java:62)
at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:289)
at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:246)
at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:254)
at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:225)
at org.jboss.as.domain.http.server.security.ElytronIdentityHandler.handleRequest(ElytronIdentityHandler.java:61)
at io.undertow.server.handlers.BlockingHandler.handleRequest(BlockingHandler.java:56)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:360)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1349)
at java.lang.Thread.run(Thread.java:748)
at org.jboss.threads.JBossThread.run(JBossThread.java:485)
If I open the web management page from another site, the error is mirrored - this time it complains about host1.tld. It's obvious that I did something wrong, but I have no idea what exactly. Will be glad if someone could help me.
So, I have installed WAS, and IHS.
I'm able to access the application directly from WAS. But IHS is trying to reply the request and its not using the plugin to reply the request.
I'm able to access the default IHS page, but not to the test application.
To create the IHS, I have done the standard stuff:
1- Install IHS and Plugin
2- Configure the plugin within the IHS
3- Create an unmanaged node on the DMGR
4- Create the webserver instance on the DMGR
I'm just trying to call a sample application called hello (for helloworld)
I see the request on the webservers logs, but they are not being redirected to the WAS.
This is the mention of the plugin on the httpd.conf:
LoadModule was_ap22_module /opt/ibm/plugin-ihs-85/test_webserver_instance1/bin/64bits/mod_was_ap22_http.so
WebSpherePluginConfig /opt/ibm/plugin-ihs-85/test_webserver_instance1/config/test_webserver_instance1/plugin-cfg.xml
This is the plugin-cfg.xml:
<?xml version="1.0" encoding="ISO-8859-1"?><!--HTTP server plugin config file for the webserver test_Cell.test_webserver_01_unmanagedNode_1.test_webserver_instance1 generated on 20
17.06.25 at 07:37:51 PM CDT-->
<Config ASDisableNagle="false" AcceptAllContent="true" AppServerPortPreference="HostHeader" ChunkedResponse="false" FIPSEnable="false" FailoverToNext="false" HTTPMaxHeaders="
300" IISDisableFlushFlag="false" IISDisableNagle="false" IISPluginPriority="High" IgnoreDNSFailures="false" KillWebServerStartUpOnParseErr="false" MarkBusyDown="false" OS400C
onvertQueryStringToJobCCSID="false" RefreshInterval="60" ResponseChunkSize="64" SSLConsolidate="true" StrictSecurity="false" TrustedProxyEnable="false" VHostMatchingCompat="f
alse">
<Log LogLevel="Error" Name="/opt/ibm/plugin-ihs-85/test_webserver_instance1/logs/test_webserver_instance1/http_plugin.log"/>
<Property Name="ESIEnable" Value="true"/>
<Property Name="ESIMaxCacheSize" Value="1024"/>
<Property Name="ESIInvalidationMonitor" Value="false"/>
<Property Name="ESIEnableToPassCookies" Value="false"/>
<Property Name="ESICacheidFull" Value="false"/>
<Property Name="PostSizeLimit" Value="-1"/>
<Property Name="PostBufferSize" Value="0"/>
<Property Name="PluginInstallRoot" Value="/opt/ibm/plugin-ihs-85/test_webserver_instance1/"/>
<Property Name="Keyfile" Value="/opt/ibm/plugin-ihs-85/test_webserver_instance1/config/test_webserver_instance1/plugin-key.kdb"/>
<Property Name="Stashfile" Value="/opt/ibm/plugin-ihs-85/test_webserver_instance1/config/test_webserver_instance1/plugin-key.sth"/>
<VirtualHostGroup Name="default_host">
<VirtualHost Name="*:9080"/>
<VirtualHost Name="*:80"/>
<VirtualHost Name="*:9443"/>
<VirtualHost Name="*:5060"/>
<VirtualHost Name="*:5061"/>
<VirtualHost Name="*:443"/>
<VirtualHost Name="*:9061"/>
<VirtualHost Name="*:9044"/>
<VirtualHost Name="*:9062"/>
<VirtualHost Name="*:9081"/>
<VirtualHost Name="*:9444"/>
<VirtualHost Name="*:9045"/>
</VirtualHostGroup>
<ServerCluster CloneSeparatorChange="false" GetDWLMTable="false" IgnoreAffinityRequests="false" LoadBalance="Round Robin" Name="test" PostBufferSize="0" PostSizeLimit="-1"
RemoveSpecialHeaders="true" RetryInterval="60" ServerIOTimeoutRetry="-1">
<Server CloneID="1bjgscrk8" ConnectTimeout="5" ExtendedHandshake="false" LoadBalanceWeight="2" MaxConnections="-1" Name="test_app_01_node_1_test1" ServerIOTimeout="900" W
aitForContinue="false">
<Transport Hostname="test_app_01" Port="9080" Protocol="http"/>
<Transport Hostname="test_app_01" Port="9443" Protocol="https">
<Property Name="keyring" Value="/opt/ibm/plugin-ihs-85/test_webserver_instance1/config/test_webserver_instance1/plugin-key.kdb"/>
<Property Name="stashfile" Value="/opt/ibm/plugin-ihs-85/test_webserver_instance1/config/test_webserver_instance1/plugin-key.sth"/>
</Transport>
</Server>
<Server CloneID="1bjgscsei" ConnectTimeout="5" ExtendedHandshake="false" LoadBalanceWeight="2" MaxConnections="-1" Name="test_app_01_node_1_test2" ServerIOTimeout="900" W
aitForContinue="false">
<Transport Hostname="test_app_01" Port="9081" Protocol="http"/>
<Transport Hostname="test_app_01" Port="9444" Protocol="https">
<Property Name="keyring" Value="/opt/ibm/plugin-ihs-85/test_webserver_instance1/config/test_webserver_instance1/plugin-key.kdb"/>
<Property Name="stashfile" Value="/opt/ibm/plugin-ihs-85/test_webserver_instance1/config/test_webserver_instance1/plugin-key.sth"/>
</Transport>
</Server>
<Server CloneID="1bjgscstv" ConnectTimeout="5" ExtendedHandshake="false" LoadBalanceWeight="2" MaxConnections="-1" Name="test_app_02_node_1_test3" ServerIOTimeout="900" W
aitForContinue="false">
<Transport Hostname="test_app_02" Port="9080" Protocol="http"/>
<Transport Hostname="test_app_02" Port="9443" Protocol="https">
<Property Name="keyring" Value="/opt/ibm/plugin-ihs-85/test_webserver_instance1/config/test_webserver_instance1/plugin-key.kdb"/>
<Property Name="stashfile" Value="/opt/ibm/plugin-ihs-85/test_webserver_instance1/config/test_webserver_instance1/plugin-key.sth"/>
</Transport>
</Server>
<Server CloneID="1bjgsctbv" ConnectTimeout="5" ExtendedHandshake="false" LoadBalanceWeight="2" MaxConnections="-1" Name="test_app_02_node_1_test4" ServerIOTimeout="900" W
aitForContinue="false">
<Transport Hostname="test_app_02" Port="9081" Protocol="http"/>
<Transport Hostname="test_app_02" Port="9444" Protocol="https">
<Property Name="keyring" Value="/opt/ibm/plugin-ihs-85/test_webserver_instance1/config/test_webserver_instance1/plugin-key.kdb"/>
<Property Name="stashfile" Value="/opt/ibm/plugin-ihs-85/test_webserver_instance1/config/test_webserver_instance1/plugin-key.sth"/>
</Transport>
</Server>
<PrimaryServers>
<Server Name="test_app_01_node_1_test1"/>
<Server Name="test_app_01_node_1_test2"/>
<Server Name="test_app_02_node_1_test3"/>
<Server Name="test_app_02_node_1_test4"/>
</PrimaryServers>
</ServerCluster>
<UriGroup Name="default_host_test_URIs">
<Uri AffinityCookie="JSESSIONID" AffinityURLIdentifier="jsessionid" Name="/hello/*"/>
</UriGroup>
<Route ServerCluster="test" UriGroup="default_host_test_URIs" VirtualHostGroup="default_host"/>
<RequestMetrics armEnabled="false" loggingEnabled="false" rmEnabled="false" traceLevel="HOPS">
<filters enable="false" type="URI">
<filterValues enable="false" value="/snoop"/>
<filterValues enable="false" value="/hitcount"/>
</filters>
<filters enable="false" type="SOURCE_IP">
<filterValues enable="false" value="255.255.255.255"/>
<filterValues enable="false" value="254.254.254.254"/>
</filters>
<filters enable="false" type="JMS">
<filterValues enable="false" value="destination=aaa"/>
</filters>
<filters enable="false" type="WEB_SERVICES">
<filterValues enable="false" value="wsdlPort=aaa:op=bbb:nameSpace=ccc"/>
</filters>
</RequestMetrics>
</Config>
Normally IHS is going to use port 80 to receive communication and rely to the application server.
The port 80 is in the default virtual host. So I added the listening port I'm using (1080) to the default virtual host.
Hi I'm trying to develop a clustered application that uses Infinispan for caching. First I tried to run in replicated mode by starting two instance of wildfly using the localhost as binding interface (with port offsets). This worked fine. But once I start the server using interface IP, cluster is not forming. Still I can access other services using the interface IP.
I tried to telnet the Jgroups port using interface IP address and it failed. But telnetting to localhost works for Jgorups port.
(Then entered localhsot[port] IP's to initial host configuration element in tcpping. Then cluster formation worked.)
So my question is why does it bind to localhost even after starting wildfly using interface IP.
Here is my configuration. (I cant use UDP, therefore need to use tcpping for cluster formation)
Started the wilfly server using
standalone.bat -Djboss.server.base.dir=../standalone_isuru -c standalone-full-ha.xml -b 192.168.17.33 -Djboss.node.name=isuru -Djboss.socket.binding.port-offset=1
Jgourps configuration
<subsystem xmlns="urn:jboss:domain:jgroups:4.0">
<channels default="ee">
<channel name="ee" stack="tcpping"/>
</channels>
<stacks>
<stack name="udp">
.
.
</stack>
<stack name="tcp">
.
.
</stack>
<stack name="tcpping">
<transport type="TCP" socket-binding="jgroups-tcp"/>
<protocol type="TCPPING">
<property name="initial_hosts">
192.168.17.33[7601], 192.168.14.39[7700], 192.168.17.33[7800]
</property>
<property name="num_initial_members">
2
</property>
<property name="port_range">
5
</property>
<property name="timeout">
1000
</property>
</protocol>
<protocol type="MERGE3"/>
<protocol type="FD_SOCK" socket-binding="jgroups-tcp-fd"/>
<protocol type="FD"/>
<protocol type="VERIFY_SUSPECT"/>
<protocol type="pbcast.NAKACK2"/>
<protocol type="UNICAST3"/>
<protocol type="pbcast.STABLE"/>
<protocol type="pbcast.GMS"/>
<protocol type="MFC"/>
<protocol type="FRAG2"/>
</stack>
</stacks>
Infinispan cache config
<cache-container name="replicated_cache" default-cache="default" module="org.wildfly.clustering.server" jndi-name="infinispan/replicated_cache">
<transport lock-timeout="60000"/>
<replicated-cache name="customer" jndi-name="infinispan/replicated_cache/customer" mode="SYNC">
<transaction locking="OPTIMISTIC" mode="FULL_XA"/>
<eviction strategy="NONE"/>
</replicated-cache>
</cache-container>
I posted the same question in Jboss developer since I didn't get any answer here.
And this is the answer I got from there.
By default Jgroups bind to private interface. When starting the server this IP can be provided as well.
standalone.bat -b 192.168.17.39 -bprivate=192.168.17.39
You can refer to the interfaces section for interface configuration.
<interfaces>
<interface name="management">
<inet-address value="${jboss.bind.address.management:127.0.0.1}"/>
</interface>
<interface name="public">
<inet-address value="${jboss.bind.address:127.0.0.1}"/>
</interface>
<interface name="private">
<inet-address value="${jboss.bind.address.private:127.0.0.1}"/>
</interface>
<interface name="unsecure">
<inet-address value="${jboss.bind.address.unsecure:127.0.0.1}"/>
</interface>
</interfaces>
socket bindings, binds jgroups to private interface
<socket-binding-group name="standard-sockets" default-interface="public" port-offset="${jboss.socket.binding.port-offset:0}">
.
<socket-binding name="jgroups-tcp" interface="private" port="7600"/>
.
</socket-binding-group>
Jgroups subsystem
<stack name="tcpping">
<transport type="TCP" socket-binding="jgroups-tcp"/>
.
</stack>
<resource methods="GET" uri-template="/getTypeCodes" faultSequence="service_error_handler_">
<inSequence>
<log level="custom">
<property name="CommonService" value="*************getTypeCodes called**************"/>
<property name="Request Payload" expression="get-property('JSON_OBJECT')"/>
</log>
<property name="HTTP_METHOD" value="GET" scope="axis2" type="STRING"/>
<property name="messageType" value="application/json" scope="axis2" type="STRING"/>
<sequence key="oauthMediationService"/>
<property name="uri.var.servicename" value="commonservice"/>
<send>
<endpoint>
<address uri="http://localhost:8080/rest/commonservice/getTypeCodes" format="rest"/>
</endpoint>
</send>
<log level="custom">
<property name="getTypeCodeResponse" expression="$body"/>
</log>
</inSequence>
<outSequence>
<send/>
</outSequence>
From the above rest example configuration i am calling the service in endpoint. After calling the endpoint i need to get the response and send that response to the the another endpoint based on condition.
You can use following configuration to call to reset service and get a response. In below sample I'm using HTTP endpoint
<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
name="peoplePutProxy"
transports="https,http"
statistics="disable"
trace="disable"
startOnLoad="true">
<target>
<inSequence>
<property name="HTTP_METHOD" value="GET" scope="axis2"/>
<property name="messageType"
value="application/x-www-form-urlencoded"
scope="axis2"/>
<send>
<endpoint>
<http method="post"
uri-template="http://localhost:8080/rest/api/people?email={uri.var.email}&firstName={uri.var.fname}&lastName={uri.var.lname}"/>
<property name="uri.var.fname" value="dhar"/>
<property name="uri.var.email" value="kasun#gmail.com"/>
<property name="uri.var.lname" value="kasun"/>
</endpoint>
</send>
</inSequence>
<outSequence>
<log level="full"/>
<property name="messageType" value="text/xml" scope="axis2"/>
<send/>
</outSequence>
</target>
<description/>
</proxy>
Http end point is where users can specify an URI Template which can dynamically populate final URI for the RESTful service invocation. Also, users can manipulate HTTP method of the outgoing request.
Please refer [1] for more information on http endpoint
[1]. http://docs.wso2.org/display/ESB470/HTTP+Endpoint
Your requirement is called 'Service Chaining'. This blog post explains how to achieve service chaining in WSO2 ESB. Go through the other article linked at the start of that blog to get a better understanding. They provide a complete example of service chaining.
Basically you can specify a sequence as the receiver of the response in a send mediator as follows.
<send receive="RespSequence">
<endpoint>
<address uri="http://localhost:8080/rest/commonservice/getTypeCodes" format="rest"/>
</endpoint>
</send>
In this case the response from calling the endpoint will be directed to RespSequence. So in that sequence you can specify the other endpoint.Refer Send Mediator doc for more info. Use Switch Mediator to check for conditions.
We have been testing the message processors and queues on wso2 esb. We have been using the sampling processor quite successfully to just log data to a DB. This POX end to end. The sampling processor correctly dequeues a message and sends it to the endpoint. The endpoint is defined as POX and non-chunked, and all this works well.
We decided to try the store and forward processor as we wanted to test out the guaranteed delivery mechanism. So we created a new processor and defined it as store and forward. In the main sequence that stores the message, we added the target.endpoint property before storing the message. The property was set to the same endpoint that was being used in the sampling scenario.
However - what have found is that in this mode, the message transformation does not happen correctly. The content type is set to text/html and the output is chunked. This causes our service to return a 415 error.
We have tried adding messageType, contentType etc to multiple place, to the axis http sender transport, etc, but it seems to make no difference at all.
Any guidance on this would be appreciated
Define the following property in the sequence before sending to the endpoint
<property name="DISABLE_CHUNKING" value="true" scope="axis2"/>
The JS code below simply inserts the messageID into the return payload to the caller. Using this with a sampling processor and sequence that simply sends to the same endpoint works fine.
<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://ws.apache.org/ns/synapse">
<registry provider="org.wso2.carbon.mediation.registry.WSO2Registry">
<parameter name="cachableDuration">15000</parameter>
</registry>
<endpoint name="test_e">
<address uri="http://192.168.45.168:8080/cgi-bin/esbcgi.pl" format="pox"/>
<property name="DISABLE_CHUNKING" value="true" scope="axis2"/>
</endpoint>
<sequence name="fault" trace="enable">
<log level="full">
<property name="MESSAGE" value="Executing default 'fault' sequence"/>
<property name="ERROR_CODE" expression="get-property('ERROR_CODE')"/>
<property name="ERROR_MESSAGE" expression="get-property('ERROR_MESSAGE')"/>
</log>
<drop/>
</sequence>
<sequence name="main" onError="fault" trace="enable">
<in>
<log level="full"/>
<property name="OUT_ONLY" value="true"/>
<property name="FORCE_HTTP_1.0" value="true" scope="axis2"/>
<script language="js">
var message = mc.getMessageID();
var messageId = message.substring(9,45);
var payload = mc.getPayloadXML().*;
mc.setPayloadXML(
<payload> <messageId>{messageId}</messageId>{payload}
</payload>);
</script>
<switch xmlns:ns="http://org.apache.synapse/xsd" xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope" xmlns:ns3="http://org.apache.synapse/xsd" source="get-property('To')">
<case regex=".*/TEST/.*">
<property name="target.endpoint" value="test_e" scope="default"/>
<store messageStore="TEST"/>
</case>
<default/>
</switch>
<property name="OUT_ONLY" value="false"/>
<script language="js">var serviceMessageId = mc.getMessageID();
mc.setPayloadXML(
<tag xmlns="http://tagcmd.com">
<messageId>{serviceMessageId}</messageId> </tag>);
</script>
<send>
<endpoint key="MessageService"/>
</send>
</in>
<out>
<script language="js">
var messagePayload= mc.getPayloadXML().*.*;
mc.setPayloadXML(
<eventResponse> <messageId>{messagePayload}</messageId> </eventResponse>);
</script>
<send/>
</out>
<description>The main sequence for the message mediation</description>
</sequence>
<messageStore class="org.wso2.carbon.message.store.persistence.jms.JMSMessageStore" name="TEST">
<parameter name="java.naming.factory.initial">org.apache.qpid.jndi.PropertiesFileInitialContextFactory</parameter>
<parameter name="java.naming.provider.url">repository/conf/jndi.properties</parameter>
<parameter name="store.jms.destination">APP8</parameter>
</messageStore>
<messageProcessor class="org.apache.synapse.message.processors.forward.ScheduledMessageForwardingProcessor" name="test_p2" messageStore="TEST">
<parameter name="max.deliver.attempts">1</parameter>
</messageProcessor>
</definitions>