Repeated EventDataDeserializationException

[shammascp]

Hi,
We are getting repeated issues regarding even data deserialization more often now

com.github.shyiko.mysql.binlog.event.deserialization.EventDataDeserializationException: Failed to deserialize data of EventHeaderV4{timestamp=1773852750000, eventType=TABLE_MAP, serverId=921, headerLength=19, dataLength=86, nextPosition=885036844, flags=0}
        at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeEventData(EventDeserializer.java:343) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeTableMapEventData(EventDeserializer.java:315) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.nextEvent(EventDeserializer.java:239) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:1077) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.BinaryLogClient.connect(BinaryLogClient.java:655) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.BinaryLogClient$7.run(BinaryLogClient.java:954) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at java.lang.Thread.run(Thread.java:840) [?:?]
Caused by: java.io.EOFException: Failed to read next byte from position 22970475
        at com.github.shyiko.mysql.binlog.io.ByteArrayInputStream.read(ByteArrayInputStream.java:226) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.io.ByteArrayInputStream.readZeroTerminatedString(ByteArrayInputStream.java:97) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.TableMapEventDataDeserializer.deserialize(TableMapEventDataDeserializer.java:40) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.TableMapEventDataDeserializer.deserialize(TableMapEventDataDeserializer.java:29) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeEventData(EventDeserializer.java:337) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        ... 6 more
2026-03-19 11:57:16 INFO  BinlogConnectorReplicator - Binlog disconnected.
2026-03-19 11:57:18 WARN  BinlogConnectorReplicator - replicator stopped at position: mysql-bin.001228:885036396 -- restarting
2026-03-19 11:57:18 INFO  BinlogConnectorReplicator - Reconnection attempt: 1 of 1
2026-03-19 11:57:18 INFO  BinaryLogClient - Database version: 8.4.4-cluster (major=8, minor=4, mariadb=false)
2026-03-19 11:57:18 INFO  BinaryLogClient - Connected to 10.0.9.21:3306 at mysql-bin.001228/885036396 (sid:6379, cid:8768)
2026-03-19 11:57:18 INFO  BinlogConnectorReplicator - Binlog connected.
2026-03-19 12:02:07 WARN  BinlogConnectorReplicator - communications failure in binlog:
com.github.shyiko.mysql.binlog.event.deserialization.EventDataDeserializationException: Failed to deserialize data of EventHeaderV4{timestamp=1773852879000, eventType=EXT_WRITE_ROWS, serverId=101, headerLength=19, dataLength=139, nextPosition=937270339, flags=0}
        at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeEventData(EventDeserializer.java:343) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.nextEvent(EventDeserializer.java:246) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:1077) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.BinaryLogClient.connect(BinaryLogClient.java:655) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.BinaryLogClient$7.run(BinaryLogClient.java:954) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at java.lang.Thread.run(Thread.java:840) [?:?]
Caused by: java.io.EOFException: Failed to read remaining 4 of 4 bytes from position 53816360. Block length: 97. Initial block length: 135.
        at com.github.shyiko.mysql.binlog.io.ByteArrayInputStream.fill(ByteArrayInputStream.java:115) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.io.ByteArrayInputStream.read(ByteArrayInputStream.java:105) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.AbstractRowsEventDataDeserializer.deserializeTimestampV2(AbstractRowsEventDataDeserializer.java:328) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.AbstractRowsEventDataDeserializer.deserializeCell(AbstractRowsEventDataDeserializer.java:179) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.AbstractRowsEventDataDeserializer.deserializeRow(AbstractRowsEventDataDeserializer.java:143) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.WriteRowsEventDataDeserializer.deserializeRows(WriteRowsEventDataDeserializer.java:64) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.WriteRowsEventDataDeserializer.deserialize(WriteRowsEventDataDeserializer.java:56) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.WriteRowsEventDataDeserializer.deserialize(WriteRowsEventDataDeserializer.java:32) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeEventData(EventDeserializer.java:337) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        ... 5 more
2026-03-19 12:02:07 INFO  BinlogConnectorReplicator - Binlog disconnected.
2026-03-19 12:02:09 WARN  BinlogConnectorReplicator - replicator stopped at position: mysql-bin.001228:937270181 -- restarting
2026-03-19 12:02:09 INFO  BinlogConnectorReplicator - Reconnection attempt: 1 of 1
2026-03-19 12:02:09 INFO  BinaryLogClient - Database version: 8.4.4-cluster (major=8, minor=4, mariadb=false)
2026-03-19 12:02:09 INFO  BinaryLogClient - Connected to 10.0.9.21:3306 at mysql-bin.001228/937270181 (sid:6379, cid:8769)
2026-03-19 12:02:09 INFO  BinlogConnectorReplicator - Binlog connected.
2026-03-19 12:04:43 WARN  BinlogConnectorReplicator - communications failure in binlog:
com.github.shyiko.mysql.binlog.event.deserialization.EventDataDeserializationException: Failed to deserialize data of EventHeaderV4{timestamp=1773852926000, eventType=EXT_WRITE_ROWS, serverId=101, headerLength=19, dataLength=230, nextPosition=961239137, flags=0}
        at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeEventData(EventDeserializer.java:343) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.nextEvent(EventDeserializer.java:246) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:1077) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.BinaryLogClient.connect(BinaryLogClient.java:655) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.BinaryLogClient$7.run(BinaryLogClient.java:954) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at java.lang.Thread.run(Thread.java:840) [?:?]
Caused by: java.io.EOFException: Failed to read remaining 4 of 5 bytes from position 24623828. Block length: 82. Initial block length: 226.
        at com.github.shyiko.mysql.binlog.io.ByteArrayInputStream.fill(ByteArrayInputStream.java:115) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.io.ByteArrayInputStream.read(ByteArrayInputStream.java:105) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.AbstractRowsEventDataDeserializer.deserializeVarString(AbstractRowsEventDataDeserializer.java:396) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.AbstractRowsEventDataDeserializer.deserializeCell(AbstractRowsEventDataDeserializer.java:189) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.AbstractRowsEventDataDeserializer.deserializeRow(AbstractRowsEventDataDeserializer.java:143) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.WriteRowsEventDataDeserializer.deserializeRows(WriteRowsEventDataDeserializer.java:64) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.WriteRowsEventDataDeserializer.deserialize(WriteRowsEventDataDeserializer.java:56) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.WriteRowsEventDataDeserializer.deserialize(WriteRowsEventDataDeserializer.java:32) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeEventData(EventDeserializer.java:337) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]
        ... 5 more
2026-03-19 12:04:43 INFO  BinlogConnectorReplicator - Binlog disconnected.

Kindly let me know if there is any solution

[osheroff]

What version of MySQL? What settings?  (Please dump your whole settings)  maybe attach the binlog hereOn Mar 19, 2026, at 04:21, shammascp ***@***.***> wrote:shammascp created an issue (zendesk/maxwell#2246) Hi, We are getting repeated issues regarding even data deserialization more often now com.github.shyiko.mysql.binlog.event.deserialization.EventDataDeserializationException: Failed to deserialize data of EventHeaderV4{timestamp=1773852750000, eventType=TABLE_MAP, serverId=921, headerLength=19, dataLength=86, nextPosition=885036844, flags=0}         at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeEventData(EventDeserializer.java:343) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeTableMapEventData(EventDeserializer.java:315) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.nextEvent(EventDeserializer.java:239) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:1077) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.BinaryLogClient.connect(BinaryLogClient.java:655) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.BinaryLogClient$7.run(BinaryLogClient.java:954) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at java.lang.Thread.run(Thread.java:840) [?:?] Caused by: java.io.EOFException: Failed to read next byte from position 22970475         at com.github.shyiko.mysql.binlog.io.ByteArrayInputStream.read(ByteArrayInputStream.java:226) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.io.ByteArrayInputStream.readZeroTerminatedString(ByteArrayInputStream.java:97) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.TableMapEventDataDeserializer.deserialize(TableMapEventDataDeserializer.java:40) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.TableMapEventDataDeserializer.deserialize(TableMapEventDataDeserializer.java:29) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeEventData(EventDeserializer.java:337) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         ... 6 more 2026-03-19 11:57:16 INFO  BinlogConnectorReplicator - Binlog disconnected. 2026-03-19 11:57:18 WARN  BinlogConnectorReplicator - replicator stopped at position: mysql-bin.001228:885036396 -- restarting 2026-03-19 11:57:18 INFO  BinlogConnectorReplicator - Reconnection attempt: 1 of 1 2026-03-19 11:57:18 INFO  BinaryLogClient - Database version: 8.4.4-cluster (major=8, minor=4, mariadb=false) 2026-03-19 11:57:18 INFO  BinaryLogClient - Connected to 10.0.9.21:3306 at mysql-bin.001228/885036396 (sid:6379, cid:8768) 2026-03-19 11:57:18 INFO  BinlogConnectorReplicator - Binlog connected. 2026-03-19 12:02:07 WARN  BinlogConnectorReplicator - communications failure in binlog: com.github.shyiko.mysql.binlog.event.deserialization.EventDataDeserializationException: Failed to deserialize data of EventHeaderV4{timestamp=1773852879000, eventType=EXT_WRITE_ROWS, serverId=101, headerLength=19, dataLength=139, nextPosition=937270339, flags=0}         at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeEventData(EventDeserializer.java:343) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.nextEvent(EventDeserializer.java:246) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:1077) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.BinaryLogClient.connect(BinaryLogClient.java:655) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.BinaryLogClient$7.run(BinaryLogClient.java:954) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at java.lang.Thread.run(Thread.java:840) [?:?] Caused by: java.io.EOFException: Failed to read remaining 4 of 4 bytes from position 53816360. Block length: 97. Initial block length: 135.         at com.github.shyiko.mysql.binlog.io.ByteArrayInputStream.fill(ByteArrayInputStream.java:115) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.io.ByteArrayInputStream.read(ByteArrayInputStream.java:105) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.AbstractRowsEventDataDeserializer.deserializeTimestampV2(AbstractRowsEventDataDeserializer.java:328) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.AbstractRowsEventDataDeserializer.deserializeCell(AbstractRowsEventDataDeserializer.java:179) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.AbstractRowsEventDataDeserializer.deserializeRow(AbstractRowsEventDataDeserializer.java:143) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.WriteRowsEventDataDeserializer.deserializeRows(WriteRowsEventDataDeserializer.java:64) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.WriteRowsEventDataDeserializer.deserialize(WriteRowsEventDataDeserializer.java:56) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.WriteRowsEventDataDeserializer.deserialize(WriteRowsEventDataDeserializer.java:32) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeEventData(EventDeserializer.java:337) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         ... 5 more 2026-03-19 12:02:07 INFO  BinlogConnectorReplicator - Binlog disconnected. 2026-03-19 12:02:09 WARN  BinlogConnectorReplicator - replicator stopped at position: mysql-bin.001228:937270181 -- restarting 2026-03-19 12:02:09 INFO  BinlogConnectorReplicator - Reconnection attempt: 1 of 1 2026-03-19 12:02:09 INFO  BinaryLogClient - Database version: 8.4.4-cluster (major=8, minor=4, mariadb=false) 2026-03-19 12:02:09 INFO  BinaryLogClient - Connected to 10.0.9.21:3306 at mysql-bin.001228/937270181 (sid:6379, cid:8769) 2026-03-19 12:02:09 INFO  BinlogConnectorReplicator - Binlog connected. 2026-03-19 12:04:43 WARN  BinlogConnectorReplicator - communications failure in binlog: com.github.shyiko.mysql.binlog.event.deserialization.EventDataDeserializationException: Failed to deserialize data of EventHeaderV4{timestamp=1773852926000, eventType=EXT_WRITE_ROWS, serverId=101, headerLength=19, dataLength=230, nextPosition=961239137, flags=0}         at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeEventData(EventDeserializer.java:343) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.nextEvent(EventDeserializer.java:246) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:1077) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.BinaryLogClient.connect(BinaryLogClient.java:655) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.BinaryLogClient$7.run(BinaryLogClient.java:954) [mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at java.lang.Thread.run(Thread.java:840) [?:?] Caused by: java.io.EOFException: Failed to read remaining 4 of 5 bytes from position 24623828. Block length: 82. Initial block length: 226.         at com.github.shyiko.mysql.binlog.io.ByteArrayInputStream.fill(ByteArrayInputStream.java:115) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.io.ByteArrayInputStream.read(ByteArrayInputStream.java:105) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.AbstractRowsEventDataDeserializer.deserializeVarString(AbstractRowsEventDataDeserializer.java:396) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.AbstractRowsEventDataDeserializer.deserializeCell(AbstractRowsEventDataDeserializer.java:189) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.AbstractRowsEventDataDeserializer.deserializeRow(AbstractRowsEventDataDeserializer.java:143) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.WriteRowsEventDataDeserializer.deserializeRows(WriteRowsEventDataDeserializer.java:64) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.WriteRowsEventDataDeserializer.deserialize(WriteRowsEventDataDeserializer.java:56) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.WriteRowsEventDataDeserializer.deserialize(WriteRowsEventDataDeserializer.java:32) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         at com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer.deserializeEventData(EventDeserializer.java:337) ~[mysql-binlog-connector-java-0.30.1.jar:0.30.1]         ... 5 more 2026-03-19 12:04:43 INFO  BinlogConnectorReplicator - Binlog disconnected. Kindly let me know if there is any solution —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[shammascp]

Mysql is version 8.4.4-cluster
this is an NDB engine. im not sure about the db settings . if you could please explain what info you need i will try and get that for you, as im not that well versed with mysql. from whatever i found about the error its showing as block size error due to NDB characteristics. can you please check on this and revert