- Removed host and port field from Peer since the same information is
available in PeerDescription
- Refactored variable names in SocketRemoteSiteListener to improve readability
- Changed how SocketRemoteSiteListener constructs PeerDescription
instance. It used to use hard-coded 'localhost' as hostname, and
getPort() which returns server's port. Since the peer is a remote peer,
i.e the client, it should be client hostname and port.
- Added hostname resolution at DataTransferResource to make s2s.host
value consistent with RAW transport. Without this, RAW uses hostname
while HTTP uses IP address. It will be hard to be used from downstream flows.
- Replaced heavy use of mockito which was difficult to maintain, with
nifi-mock
- Added SiteToSiteAttributes and more assertions in unit tests
This closes#1342.
Signed-off-by: Bryan Bende <bbende@apache.org>
NIFI-1582 removing the option to use cluster state
NIFI-1582 addressing Oleg's comments
NIFI-1582 No longer forcing numbers as the init value and adding getStateValue() to EL instead of using 'ATTRIBUTE_state'
NIFI-1582 Removing init state value
NIFI-1582 Adding documentation for the changes to Init State value
This closes#319
- Added urls in addition to the existing url, to support multiple target
URLs
- Backward compatibility is provided by returning the first url if
multipe urls are specified, but component accessing the url doesn't
support multiple urls
- UI is not fully updated yet. Following UI components are planned to be updated
by different commits
- Search component: only the first URL is searchable and shown
- Component status: RPG status shows only the first URL
- Component action history: only the first URL is searchable and shown
- Updated Search component to use URLs.
This closes#1208.
- Changed AtomicBoolean to CountDownLatch to avoid sleeping thread in
some test cases
- Specified less number of threads for Jetty and LittleProxy than
default to lower resource usage
- Added try catch for the specific gateway timeout case (504) so that
test can pass even it happens while it fails with other errors
NIFI-2854: Incorporated PR review feedback
NIFI-2854: Implemented feedback from PR Review
NIFI-2854: Ensure that all resources are closed on CompressableRecordReader.close() even if an IOException is thrown when closing one of them
This closes#1202
- introduced org.apache.nifi.stream.io.util.TextLineDemarcator
- refactored SplitText to use org.apache.nifi.stream.io.util.TextLineDemarcator
- updated SplitText's capability discription to provide more clarity around splits with headers.
NIFI-1712 Applying per-instance class loading to HBaseClientService to allow specifying Phoenix Client JAR
-Refactoring the ClassLoading so that every processor, controller service, and reporting task gets an InstanceClassLoader with a parent of the NAR ClassLoader, and only components with @RequiresInstanceClassLoading will make a copy of the NAR ClassLoader resources, and addressing some review feedback
This closes#1156
* Java version and vendor
* OS name and version
* Release Tag
* Build revision (commit SHA), branch, and timestamp
* Handles formal releases, ad-hoc builds, and non-release source builds
* Standalone UI presence in About dialog, Summary -> System Diagnostics
* Cluster UI as Versions tab in Cluster dialog
* Reduce About Dialog Content
* Fix Missing Property Display Bugs
* Marking the build time as type string.
* This closes#583
- Consolidated the target cluster URL resolving logic into
SiteToSiteRestApiClient's as a common method
- Changed to more descriptive error message
- Added more unit test cases
- Added following properties:
- nifi.web.http.port.forwarding
- nifi.web.https.port.forwarding
This closes#1100.
Signed-off-by: Koji Kawamura <ijokarumawak@apache.org>
This commit fixes following two issues, that happens when a Root Group Port
policy for S2S data transfer is removed at a remote NiFi, after a client NiFi has
connected to that port:
1. At client side, Remote Process Group should show that authorization
is failing on its bulletin, but the Exception is caught and
ignored. Nothing is shown on the UI with HTTP transport protocol.
RAW S2S shows error on RPG bulletin. This commit fixes HTTP S2S to
behave the same.
2. At server side, corresponding input-port or output-port should show
that it is accessed by an unauthorized client on its bulletin, but it's
not shown with HTTP transport protocol.
RAW S2S shows warning messages for this. This commit fixes HTTP S2S to
behave the same.
In order to fix the 2nd issue above, request authorization at
DataTransferResource is changed from using DataTransferAuthorizable
directly, to call RootGroupPort.checkUserAuthorization().
Because the blettin is tied to the Port instance and it's
difficult to produce blettin message from this resource.
Since RootGroupPort.checkUserAuthorization uses
DataTransferAuthorizable inside, the check logic stays the same as
before.
Adding a RootGroupPortAuthorizable to provide access to necessary components for performing the authorization.
This closes#996
- Fixing contrib check issues.
- Clean up pom.
- Addressing issue where reporting task property descriptor using wrong scope.
NIFI-2635:
- Fixing issue with revisions when creating users and user groups.
- Forwarding requests to the coordinator instead of replicating.
- Tweaking verbage in dialog for removing users and groups.
This closes#943
Without this fix, NiFi fails to send data via HTTP Site-to-Site through
Proxy which requires authentication due to AsynchronousCloseException.
It happens when async client replays producing contents in order to re-send the
request with auth credential for the proxy server, however the
connection is already closed.
This fix makes NiFi to send actual data only at the second round of requests, so that flow-file
contents can be sent without reading it twice.
Signed-off-by: Yolanda M. Davis <ymdavis@apache.org>
This closes#915
Refresh remote peer statuses even if the bootstrap node goes down.
Migrate existing code which handles the situation from
EndpointConnectionPool to PeerSelector, so that both RAW and HTTP
transport protocol has the same capability.
This closes#927.
- It couldn't send data larger than about 7KB due to the mis-use of
httpasyncclient library
- Updated httpasyncclient from 4.1.1 to 4.1.2
- Let httpasyncclient framework to call produceContent multiple times as
it gets ready to send more data via SSL session
- Added HTTPS test cases to TestHttpClient, which failed without this
fix
- Logic for sorting DN, reversing X500Names before using them to generate certificate
- Logging reordered dn
- Accounting for limited crypto pkcs12, allowing password specification for client certificates
- Updating tests to work with or without jce unlimited
- Loading keystore for test in try-with
This closes#824.
Signed-off-by: Bryan Bende <bbende@apache.org>
- Removed message queueing which could result in data loss
- Fixed life-cycle issues that coudl put processor in an unstable state
- Fixed PropertyDescriptor translation for Time units and Byte sizes
- Fixed broken tests
- Added additional tests
NIFI-2519 added default for SMTP_MAXIMUM_CONNECTIONS
NIFI-2519 addressed PR comments, polishing
- fixed intermittent deadlock on processor stop and added test for it
- the attributes that can not be extracted from the message but available via MessageContext are written into the outgoing FlowFile
- other minor fixes
NIFI-2519 addressed lates PR comments
NIFI-2519 added better messaging when server closes the connection
NIFI-2519 some polishing and additional tests to validate deadlocks
NIFI-2519 address latest PR comments
fixed deadlock condition for when the consumer is stopped while server is distributing messages
fixed MAX message size issue ensuring it is validated
set max connections to SMTPServer
polished pom
added L&N
NIFI-2519 PR comments
- fixed LICENSE
- Added usage of LimitingInputStream
- simplified SmtpConsumer by removing hasMessage operation
This closes#695.
Signed-off-by: Andy LoPresto <alopresto@apache.org>
Defaulting to same keyStore, key password (+18 squashed commits)
Squashed commits:
[9d01ba0] NIFI-2193 - Fixing typo
[55440bc] NIFI-2193 - Standalone can run as long as there are no conflicting files/folders
[0ca34ed] NIFI-2193 - Fixing some filename, absolute path issues
[9d4f65b] NIFI-2193 - Incorporating feedback
[f7550b4] NIFI-2193 - Cleaning up imports
[59a7637] NIFI-2193 - Updating umask to allow owner to execute
[cf824e7] NIFI-2193 - Moving DN arg to CA service specific parent class
[921ee13] NIFI-2193 - Making keystore getInstance more consistent
[a283c4b] NIFI-2193 - Updating sample config files in assembly to reflect new structure
[8d3a21d] NIFI-2193 - Making TlsHelper static, adding option to use same password for Key, KeyStore
[b13d247] NIFI-2193 - Addressing PR feedback
[46ef8ed] NIFI-2193 - Removing commons-logging, log4j from notice
[d4cf41a] NIFI-2193 - Adding option to specify output file for CA certificate when using cli client
[b74bf25] NIFI-2193 - Removing Bouncy Castle from notice
[6e34f9a] NIFI-2193 - Adding CLI client for easier generation of client certificates
[2924fca] NIFI-2193 - nifi-toolkit-ssl -> nifi-toolkit-tls, removing unused constants
[886167e] NIFI-2193 - Adding slf4j to avoid runtime issue
[082de46] NIFI-2193 - Command line SSL config utility as well as certificate authority client/server
Fixed NPE (+2 squashed commits)
Squashed commits:
[c5d521a] NIFI-2466: Added unit test to verify changes; fixed validation
[aa4d418] NIFI-2446: Add option to specify key password when different than keystore password
This closes#776.
Signed-off-by: Andy LoPresto <alopresto@apache.org>
Fixed Site-to-Site Transit URI for HTTP to be consistent with RAW socket.
- Removed url from CommunicationsSession since it's redundant as we have
Peer.url, too. The value was not used from anywhere other than HTTP
Site-to-Site.
- Added createTransitUri method in Communicant interface, so that
implementation can customize transitUri while providing consistent
interface.
- added SnippetUtilsTest
- renamed TypeOneUUIDGenerator to ComponentIdGenerator
- changed lsb part of ComponentIdGenerator back to long
- Fixed 'isCopy' condition for clustered environments
This closes#718.
- Updated site-to-site client and server to support clustered nifi instances
NIFI-2274:
- Ensuring we use the correct URI when updating a connection.
This closes#530
NIFI-2020 - updates to use lambdas/stream wherever possible and fix potential nullpointer issue.
Signed-off-by: Matt Burgess <mattyb149@apache.org>
This closes#564
- Added following properties:
- nifi.flow.configuration.archive.enabled
- nifi.flow.configuration.archive.max.time
- nifi.flow.configuration.archive.max.storage
- Removed manual archive operation:
- Removed 'Back-up flow' link from UI since it's not needed any longer
- Removed corresponding REST API controller/archive and its
implementations
- Added FlowConfigurationArchiveManager to enclose archive related code
- Updated related docs
- Adding a page for managing users and groups.
- Adding a page for managing access policies.
- Renaming accessPolicy in entity to permissions to avoid confusion with the accessPolicy model.
- Adding an Authorizable for access policies.
- Refactoring access policies endpoints.
NIFI-2022:
- Implementing site to site authorizations.
NIFI-2201 Add support for seeding cluster nodes in authorizations.xml
- Passing client address along in user context on authorization requests
- This closes#628
Added unit tests for DN extraction.
Corrected typo in Javadoc.
Switched server/client socket logic for certificate extraction -- when the local socket is in client/server mode, the peer is necessarily the inverse.
Fixed unit tests.
Moved lazy-loading authentication access out of isDebugEnabled() control branch.
This closes#622
- Updating UI according to permissions through out the application.
- Shuffling provenance events, template, and cluster search REST APIs according to resources being authorized.
- Moving template upload controls.
- Removing username where appropriate.
- Addressing issues when authorizing flow configuration actions.
- Code clean up.
Squashed commits:
[16dd4ba] NIFI-1958 fixed logic on incoming time units. Removed feature tests to convert to weeks because it will not be implemented.
[1b22e58] NIFI-1958 added logic to getTimeDuration to handle weeks as a string value to parse but did not add TimeUnit yet. 3/5 feature test pass.
[7136544] NIFI-1958 Moved tests to correct module.
[7d95653] NIFI-1958 Added feature tests for negative values.
[ffc3941] NIFI-1958 Added second feature test.
[7d16bbe] NIFI-1958 Added new feature test and regression test for week conversion.
This closes#544.
Signed-off-by: Andy LoPresto <alopresto@apache.org>
Fixed IDE setting for import wildcarding on Groovy files. (+4 squashed commits)
Squashed commits:
[4c3b174] NIFI-1981 Lowered logging level of client auth setting on cluster connection receive.
[b50f473] NIFI-1981 Finished logic to suppress exception on missing client certificates when clientAuth is set to WANT.
Added unit tests for CertificateUtil methods.
[ace35a2] NIFI-1981 Added test scope dependency on BouncyCastle and BC PKIX modules for CertificateUtils tests.
[2c463d1] NIFI-1981 Added ClientAuth enum and CertificateUtil methods to extract this setting from an SSLSocket.
Added logic to compare X509Certificate DNs regardless of RDN element order.
Added logic to suppress peer certificate exceptions when client authentication is not required.
Removed duplicate dependency in pom.xml.
- Listening for window resize events more selectively.
- Fixing malformed request when configuring remote process group ports.
- Fixing malformed request when starting/stopping a selected process group.
- Fixing default value for authorizers.xml.
- This closes#524
- Enable HTTP(S) for Site-to-Site communication
- Support HTTP Proxy in the middle of local and remote NiFi
- Support BASIC and DIGEST auth with Proxy Server
- Provide 2-phase style commit same as existing socket version
- [WIP] Test with the latest cluster env (without NCM) hasn't tested yet
- Fixed Buffer handling issues at asyc http client POST
- Fixed JS error when applying Remote Process Group Port setting from UI
- Use compression setting from UI
- Removed already finished TODO comments
- Added additional buffer draining code after receiving EOF
- Added inspection and assert code to make sure Site-to-Site client has
written data fully to output
stream
- Changed default nifi.remote.input.secure from true to false
This closes#497.
- Refactoring to allow requests to be replicated from a node to other nodes
- Renaming cluster node connection/read timeout properties.
- Renaming NCM DN to Cluster Coordinator DN.
- Fixing default values in properties.
- Starting to fix Spring context to load correctly in standalone mode.
- Using the cluster protocol to handle connection failures instead of heartbeats.
- Ensured replicate call is returned from ControllerResource.
- Ensure the appropriate classloader when serializing templates.
- Handling when the flow contents are null.
- This closes#488
Reverted whitespace changes. (+8 squashed commits)
Squashed commits:
[329755c] NIFI-1919 Reverted import re-organization from IDE.
[cf73c2f] NIFI-1919 Updated expression language guide.
[d9a1455] NIFI-1919 Reverted changes to ReplaceEvaluator.
Added ReplaceFirstEvaluator.
Added replace first logic to Query buildFunctionEvaluator.
Added unit tests.
[e2eb880] NIFI-1919 Added replaceFirst to AttributeExpression lexer and parser grammar definitions.
[11fe913] NIFI-1919 Ignored demonstrative test for replaceAll as it behaves as expected.
[af97be1] NIFI-1919 Changed ReplaceEvaluator to use String#replaceFirst which interprets regex instead of compiling as literal.
Demonstrative unit test now passes but two existing unit tests fail. I am not sure these tests are correct.
[f24f17b] NIFI-1919 Added working unit test to illustrate fix.
[8a0d43b] NIFI-1919 Added Groovy unit test to demonstrate issue.
Added DelegatingMetaClass code to record it (test not complete).
This closes#474.
Signed-off-by: Andy LoPresto <alopresto@apache.org>
- Improved StreamScanner for better performance
- Renamed StreamScanner to StreamDemarcator as suggested by Joe
- Added failure handling logic to ensure both processors can be reset to their initial state (as if they were just started)
- Provided comprehensive test suite to validate various aspects of both Publish and Consume from Kafka
- Added relevant javadocs
- Added initial additionalDetails docs
- Addressed NPE reported by NIFI-1764
- Life-cycle refactoring for the existing PutKafka to ensure producer restart after errors
- Incorporated code changes contributed by Ralph Perko (see NIFI-1837)
- Addressed partition issue in RoundRobinPartitioner discussed in NIFI-1827
- Updated PropertyDescriptor descriptions to reflect their purpose
NIFI-1296 added @Ignore on some Kafka tests to improve test time
NIFI-1296 reworked tests to avoid dependency on embedded Kafka
NIFI-1296 fixed spelling error
NIFI-1296 fixed trailing whitespaces in non-java files
This closes#366
- Started refactoring heartbeating mechanism, using a new package: org.apache.nifi.cluster.coordination
- Added configuration options for ZooKeeper username & password for heartbeat management. Also addressed issue where nodes that were previously disconnected were asked to disconnect upon restart
- Ensure that ACL is set properly when creating heartbeat node. Removed unused ControllerStartupFailureMessage.java
- Changed ZooKeeper ACL's so that container nodes that would not be sensitive are wide open and removed the usage of username & password when communicating with ZooKeeper. This was done specifically because username/password combination is considered a 'testing' feature that should not be used in production and is not supported by Apache Curator
- Refactored CuratorHeartbeatMonitor into an abstract heartbeat monitor that is responsible for processing heartbeats and CuratorHeartbeatMonitor that is responsible for retrieving heartbeat information
- Refactored so that heartbeats are sent to Cluster Coordinator directly instead of to ZooKeeper. ZooKeeper is used to know which node is the cluster coordinator but heartbeats to the Cluster Coordinator provide additional information about the nodes.
- Started refactoring heartbeating mechanism, using a new package: org.apache.nifi.cluster.coordination
- Added configuration options for ZooKeeper username & password for heartbeat management. Also addressed issue where nodes that were previously disconnected were asked to disconnect upon restart
- Changed ZooKeeper ACL's so that container nodes that would not be sensitive are wide open and removed the usage of username & password when communicating with ZooKeeper. This was done specifically because username/password combination is considered a 'testing' feature that should not be used in production and is not supported by Apache Curator
NIFI-1727:
- Refactored logic for merging HTTP Requests that are federated across cluster
NIFI-1745:
- Refactoring how HTTP Requests are replicated to nodes
- Bug fixes and continuing to work on replication refactoring. Still need to handle cluster locking and revisions
- Begin work on RevisionManager
- Resolved some issues that resulted from rebase
- Fixed URIs to align with new URI's that will be used in 1.0.0
- This closes#413
Added configuration options for ZooKeeper username & password for heartbeat management. Also addressed issue where nodes that were previously disconnected were asked to disconnect upon restart
Ensure that ACL is set properly when creating heartbeat node. Removed unused ControllerStartupFailureMessage.java
Changed ZooKeeper ACL's so that container nodes that would not be sensitive are wide open and removed the usage of username & password when communicating with ZooKeeper. This was done specifically because username/password combination is considered a 'testing' feature that should not be used in production and is not supported by Apache Curator
Refactored CuratorHeartbeatMonitor into an abstract heartbeat monitor that is responsible for processing heartbeats and CuratorHeartbeatMonitor that is responsible for retrieving heartbeat information
Refactored so that heartbeats are sent to Cluster Coordinator directly instead of to ZooKeeper. ZooKeeper is used to know which node is the cluster coordinator but heartbeats to the Cluster Coordinator provide additional information about the nodes.
Code cleanup and incorporate comments from peer review
This closes#323
- Removing the AuthorityProvider.
- Refactoring REST API in preparation for introduction of the Authorizer.
- Updating UI accordingly.
- Removing unneeded properties from nifi.properties.
- Addressing comments from PR.
- This closes#359.
Fixed nifi-utils pom.xml comment about additional dependencies. (+5 squashed commits)
Squashed commits:
[965b766] NIFI-1753 Removed temporary work-around of duplicate certificate conversion util method and added nifi-security-utils as dependency of nifi-utils.
[cd35f9b] NIFI-1753 Replaced legacy X.509 certificate declarations with new declarations in SSLSocketChannel and EndpointConnectionPool.
Temporary work-around of duplicate certificate conversion util method because nifi-utils cannot depend on nifi-security-utils.
[6420897] NIFI-1753 Replaced legacy X.509 certificate declarations with new declarations in PostHTTP.
[b9868ef] NIFI-1753 Added convenience method for extracting DN from peer certificate chain in SSL socket (canonical implementation to reduce code duplication and references to legacy certificate implementations).
Refactored logic retrieving legacy X.509 certificates with reference to convenience method in NodeProtocolSenderImpl.
Replaced logic retrieving legacy X.509 certificates with reference to convenience method in SocketProtocolListener.
Cleaned up exception handling in SocketProtocolListener.
Replaced legacy X.509 certificate declarations with new declarations in HandleHttpRequest (needs manual test).
[e2d1c35] NIFI-1753 Added convenience methods for converting legacy X.509 certificates and abstract certificates to correct X.509 format.
Added unit tests for certificate manipulation.
Replaced logic retrieving legacy X.509 certificates with new logic in NodeProtocolSenderImpl.
Added bcpkix (Bouncy Castle PKI implementation) dependency to nifi-standard-processors pom.
This closes#346.
Signed-off-by: Andy LoPresto <alopresto@apache.org>
- Storing UGI so we can support multiple HBaseClientServices with different configs
- Creating nifi-hadoop-utils to hold utility code shared between HDFS and HBase processors
- Incorporating KerberosProperties into existing hadoop processors
This closes#281
NIFI-1274 Cleaned up TODO statements. (+3 squashed commits)
Squashed commits:
[fd101cd] Removed logic to check for presence of services to determine if token support is enabled when username/password authentication is enabled (Kerberos also requires tokens).
[c2ce29f] Reverted import changes to RulesResource.java.
[c269d72] Added Kerberos authentication mechanism.
Moved Kerberos service wiring from XML to Java to handle scenario where admin has not configured Kerberos (previously threw NullPointerException in FileSystemResource constructor). (+15 squashed commits)
Squashed commits:
[09fc694] Added Kerberos documentation to Admin Guide.
[ecfb864] Cleaned up unused logic.
[157efb3] Added logic to determine if client certificates are required for REST API (login, anonymous, and Kerberos service authentication all disabled).
Cleaned up KerberosService by moving logic to NiFiProperties.
[5438619] Added documentation for Kerberos login-identity-providers.xml.
[3332d9f] Added NiFi properties for Kerberos SSO.
[b14a557] Fixed canvas call to only attempt Kerberos login if JWT not present in local storage.
Added logic to handle ticket validation failure in AccessResource.
Changed wiring of Kerberos service beans to XML in nifi-web-security-context.xml for consistency.
[c31ae3d] Kerberos SPNEGO works without additional filter (new entry endpoint accepts Kerberos ticket in Authorization header and returns JWT so the rest of the application functions the same as LDAP).
[98460e7] Added check to only instantiate beans when Kerberos enabled to allow access control integration tests to pass.
[6ed0724] Renamed Kerberos discovery method to be explicit about service vs. credential login.
[ed67d2e] Removed temporary solution for Rules Resource access via Kerberos ticket.
[c8b2b01] Added temporary solution for Rules Resource access via Kerberos ticket.
[81ca80f] NIFI-1274 Added KerberosAuthenticationFilter to conduct SPNEGO authentication with local (client) Kerberos ticket.
Added properties and accessors for service principal and keytab location for NiFi app server.
Added KAF to NiFiWebApiSecurityConfiguration.
Added AlternateKerberosUserDetailsService to provide user lookup without dependency on extension bundle (nifi-kerberos-iaa-provider).
Added dependencies on spring-security-kerberos-core and -web modules to pom.xml.
[0605ba8] Added working configuration files to test/resources in kerberos module to document necessary config. This version requires the user to enter their Kerberos username (without realm) and password into the NiFi login screen and will authenticate them against the running KDC.
Also includes a sample keystore and root CA public key for configuring a secure instance.
[49236c8] Added kerberos module dependencies to nifi/pom.xml and nifi-assembly/pom.xml.
Added default properties to login-identity-providers.xml.
[928c52b] Added nifi-kerberos-iaa-providers-bundle module to nifi/pom.xml.
Added skeleton of Kerberos authenticator using Spring Security Kerberos plugin.
This closes#284
Signed-off-by: Matt Gilman <matt.c.gilman@gmail.com>
* Simplified and cleaned StandardProcessScheduler.start/stopProcessor methods
* Added stop/start operations to ProcessorNode.
* Removed unnecessary synchronization blocks related to ScheduledState in favor of enforcing order and idempotency via CAS operations. Those synchronization blocks were causing intermittent deadlocks whenever @OnScheduled blocks indefinitely.
* Added support for stopping the service when @OnScheduled operation hangs.
* Fixed the order of life-cycle operation invocation ensuring that each operation can *only* be invoked at the appropriate time
* Removed unnecessary locks from StandardProcessNode since Atomic variables are used.
* Removed calls to @OnStopped from ContinuallyRunningProcessTask while ensuring that procesor's full shut down in implementation of StandardProcessorNode.stop() method.
* Removed dead code
* Added comprehensive tests suite that covers 95% of Processor's life-cycle operations within the scope of FlowController, StandardProcesssScheduler and StandardProcessNode
* Improved and added javadocs on covered operations with detailed explanations.
- Adding Network Interface property to AbstractListenEventProcessor and ListenSyslog
- Adding sending host and sending port to DatagramChannelDispatcher
- Creation of common base class AbstractListenEventBatchingProcessor
- Refactor of ListenUDP, ListenTCP, and ListenRELP to all extend from AbstractListenEventBatchingProcessor
- Changing DatagramChannelDispatcher, socket handlers, and RELP handler to use offer() when queueing instead of put(), and log an error if the offer failed
This closes#266