lengkristy opened a new issue, #8610:
URL: https://github.com/apache/iceberg/issues/8610
### Apache Iceberg version
None
### Query engine
None
### Please describe the bug 🐞
java code just like this:
`
Configuration configuration = new Configuration();
// this is a local file catalog
HadoopCatalog hadoopCatalog = new HadoopCatalog(configuration,
icebergWareHousePath);
TableIdentifier name = TableIdentifier.of("logging", "logs");
Schema schema = new Schema(
Types.NestedField.required(1, "level",
Types.StringType.get()),
Types.NestedField.required(2, "event_time",
Types.TimestampType.withZone()),
Types.NestedField.required(3, "message",
Types.StringType.get()),
Types.NestedField.optional(4, "call_stack",
Types.ListType.ofRequired(5, Types.StringType.get()))
);
PartitionSpec spec = PartitionSpec.builderFor(schema)
.hour("event_time")
.identity("level")
.build();
Table table = hadoopCatalog.createTable(name, schema, spec);
GenericAppenderFactory appenderFactory = new
GenericAppenderFactory(table.schema());
int partitionId = 1, taskId = 1;
OutputFileFactory outputFileFactory =
OutputFileFactory.builderFor(table, partitionId,
taskId).format(FileFormat.PARQUET).build();
final PartitionKey partitionKey = new PartitionKey(table.spec(),
table.spec().schema());
// partitionedFanoutWriter will auto partitioned record and create
the partitioned writer
PartitionedFanoutWriter<Record> partitionedFanoutWriter = new
PartitionedFanoutWriter<Record>(table.spec(), FileFormat.PARQUET,
appenderFactory, outputFileFactory, table.io(), TARGET_FILE_SIZE_IN_BYTES) {
@Override
protected PartitionKey partition(Record record) {
partitionKey.partition(record);
return partitionKey;
}
};
Random random = new Random();
List<String> levels = Arrays.asList("info", "debug", "error",
"warn");
GenericRecord genericRecord = GenericRecord.create(table.schema());
// assume write 1000 records
for (int i = 0; i < 1000; i++) {
GenericRecord record = genericRecord.copy();
record.setField("level",
levels.get(random.nextInt(levels.size())));
// record.setField("event_time", System.currentTimeMillis());
record.setField("event_time", OffsetDateTime.now());
record.setField("message", "Iceberg is a great table format");
record.setField("call_stack",
Arrays.asList("NullPointerException"));
partitionedFanoutWriter.write(record);
}
AppendFiles appendFiles = table.newAppend();
// submit datafiles to the table
Arrays.stream(partitionedFanoutWriter.dataFiles()).forEach(appendFiles::appendFile);
// submit snapshot
Snapshot newSnapshot = appendFiles.apply();
appendFiles.commit();
`
Data loss may occur when writing iceberg with high concurrency.
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