APAR status
Closed as program error.
Error description
If the Kafka Consumer Node is configured to authenticate using SASL over TLS then under some circumstances when the Kafka server is restarted this may cause an OutOfMemoryError with the following stack: 3XMTHREADINFO3 Java callstack: 4XESTACKTRACE at java/nio/HeapByteBuffer.<init>(HeapByteBuffer.java:57) 4XESTACKTRACE at java/nio/ByteBuffer.allocate(ByteBuffer.java:335) 4XESTACKTRACE at org/apache/kafka/common/memory/ MemoryPool$1.tryAllocate(MemoryPool.java:30) 4XESTACKTRACE at org/apache/kafka/common/network /NetworkReceive.readFrom(NetworkReceive.java:113) 4XESTACKTRACE at org/apache/kafka/common/securit y/authenticator/SaslClientAuthenticator.receiveResponseOrToken( SaslClientAuthenticator.java:475) 4XESTACKTRACE at org/apache/kafka/common/securit y/authenticator/SaslClientAuthenticator.receiveKafkaResponse(Sa slClientAuthenticator.java:572) 4XESTACKTRACE at org/apache/kafka/common/securit y/authenticator/SaslClientAuthenticator.authenticate(SaslClient Authenticator.java:250) 4XESTACKTRACE at org/apache/kafka/common/network /KafkaChannel.prepare(KafkaChannel.java:181) 4XESTACKTRACE at org/apache/kafka/common/network /Selector.pollSelectionKeys(Selector.java:543) 4XESTACKTRACE at org/apache/kafka/common/network/Selector.poll(Selector.java:481) 4XESTACKTRACE at org/apache/kafka/clients/Networ kClient.poll(NetworkClient.java:551) 4XESTACKTRACE at org/apache/kafka/clients/consum er/internals/ConsumerNetworkClient.poll(ConsumerNetworkClient.j ava:265) 4XESTACKTRACE at org/apache/kafka/clients/consum er/internals/ConsumerNetworkClient.poll(ConsumerNetworkClient.j ava:236) 4XESTACKTRACE at org/apache/kafka/clients/consum er/internals/ConsumerNetworkClient.poll(ConsumerNetworkClient.j ava:215) 4XESTACKTRACE at org/apache/kafka/clients/consum er/internals/Fetcher.getTopicMetadata(Fetcher.java:374) 4XESTACKTRACE at org/apache/kafka/clients/consum er/KafkaConsumer.partitionsFor(KafkaConsumer.java:1949) 4XESTACKTRACE at org/apache/kafka/clients/consum er/KafkaConsumer.partitionsFor(KafkaConsumer.java:1917) 4XESTACKTRACE at com/ibm/broker/connector/kafka/ KafkaIIBConsumer.initialise(KafkaIIBConsumer.java:177) 4XESTACKTRACE at com/ibm/broker/connector/kafka/ KafkaIIBConsumer.start(KafkaIIBConsumer.java:512) 5XESTACKTRACE (entered lock: com/ibm/broker/c onnector/kafka/KafkaIIBConsumer@0x00000000C0A94038,entry count: 4XESTACKTRACE at com/ibm/broker/connector/kafka/ KafkaInputConnector.start(KafkaInputConnector.java:250) The issue is caused by a single large allocation made by the Kafka Client when it reads unexpected data from a socket.
Local fix
Problem summary
**************************************************************** USERS AFFECTED: All users of IBM Integration Bus version 10.1 or IBM App Connect version 11 or 12 using the Kafka Nodes. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: If the Kafka Consumer Node is configured to authenticate using SASL over TLS then under some circumstances when the Kafka server is restarted this may cause an OutOfMemoryError with the following stack: 3XMTHREADINFO3 Java callstack: 4XESTACKTRACE at java/nio/HeapByteBuffer.<init>(HeapByteBuffer.java:57) 4XESTACKTRACE at java/nio/ByteBuffer.allocate(ByteBuffer.java:335) 4XESTACKTRACE at org/apache/kafka/common/memory/MemoryPool$1.tryAllocate(MemoryPo ol.java:30) 4XESTACKTRACE at org/apache/kafka/common/network/NetworkReceive.readFrom(NetworkR eceive.java:113) 4XESTACKTRACE at org/apache/kafka/common/security/authenticator/SaslClientAuthent icator.receiveResponseOrToken(SaslClientAuthenticator.java:475) 4XESTACKTRACE at org/apache/kafka/common/security/authenticator/SaslClientAuthent icator.receiveKafkaResponse(SaslClientAuthenticator.java:572) 4XESTACKTRACE at org/apache/kafka/common/security/authenticator/SaslClientAuthent icator.authenticate(SaslClientAuthenticator.java:250) 4XESTACKTRACE at org/apache/kafka/common/network/KafkaChannel.prepare(KafkaChanne l.java:181) 4XESTACKTRACE at org/apache/kafka/common/network/Selector.pollSelectionKeys(Selec tor.java:543) 4XESTACKTRACE at org/apache/kafka/common/network/Selector.poll(Selector.java:481) 4XESTACKTRACE at org/apache/kafka/clients/NetworkClient.poll(NetworkClient.java:5 51) 4XESTACKTRACE at org/apache/kafka/clients/consumer/internals/ConsumerNetworkClien t.poll(ConsumerNetworkClient.java:265) 4XESTACKTRACE at org/apache/kafka/clients/consumer/internals/ConsumerNetworkClien t.poll(ConsumerNetworkClient.java:236) 4XESTACKTRACE at org/apache/kafka/clients/consumer/internals/ConsumerNetworkClien t.poll(ConsumerNetworkClient.java:215) 4XESTACKTRACE at org/apache/kafka/clients/consumer/internals/Fetcher.getTopicMeta data(Fetcher.java:374) 4XESTACKTRACE at org/apache/kafka/clients/consumer/KafkaConsumer.partitionsFor(Ka fkaConsumer.java:1949) 4XESTACKTRACE at org/apache/kafka/clients/consumer/KafkaConsumer.partitionsFor(Ka fkaConsumer.java:1917) 4XESTACKTRACE at com/ibm/broker/connector/kafka/KafkaIIBConsumer.initialise(Kafka IIBConsumer.java:177) 4XESTACKTRACE at com/ibm/broker/connector/kafka/KafkaIIBConsumer.start(KafkaIIBCo nsumer.java:512) 5XESTACKTRACE (entered lock: com/ibm/broker/connector/kafka/KafkaIIBConsumer@0x00000000C0A940 38,entry count: 4XESTACKTRACE at com/ibm/broker/connector/kafka/KafkaInputConnector.start(KafkaIn putConnector.java:250) The issue is caused by a single large allocation made by the Kafka Client when it reads unexpected data from a socket.
Problem conclusion
The product now catches OutOfMemoryError with this specific stack trace in order to prevent a failure. Connection will be re-attempted once the server is available again. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v11.0 11.0.0.25 v12.0 10.1.0.3 The latest available maintenance can be obtained from: http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041 If the maintenance level is not yet available,information on its planned availability can be found on: http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308 ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
IT44159
Reported component name
APP CONNECT ENT
Reported component ID
5724J0560
Reported release
C00
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2023-07-13
Closed date
2024-01-18
Last modified date
2024-01-18
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
APP CONNECT ENT
Fixed component ID
5724J0560
Applicable component levels
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSDR5J","label":"IBM App Connect Enterprise"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"C00","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
23 January 2024