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Core: Fix compute_table_stats failures with concurrent writes #15148

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9f01b7b
Core: Fix compute_table_stats failures with concurrent writes
hemanthboyina Jan 26, 2026
5a897dd
fixed test failures and moved tests to TestSetStatistics
hemanthboyina Jan 27, 2026
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35 changes: 30 additions & 5 deletions core/src/main/java/org/apache/iceberg/SetStatistics.java
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Original file line number Diff line number Diff line change
Expand Up @@ -18,17 +18,31 @@
*/
package org.apache.iceberg;

import static org.apache.iceberg.TableProperties.COMMIT_MAX_RETRY_WAIT_MS;
import static org.apache.iceberg.TableProperties.COMMIT_MAX_RETRY_WAIT_MS_DEFAULT;
import static org.apache.iceberg.TableProperties.COMMIT_MIN_RETRY_WAIT_MS;
import static org.apache.iceberg.TableProperties.COMMIT_MIN_RETRY_WAIT_MS_DEFAULT;
import static org.apache.iceberg.TableProperties.COMMIT_NUM_RETRIES;
import static org.apache.iceberg.TableProperties.COMMIT_NUM_RETRIES_DEFAULT;
import static org.apache.iceberg.TableProperties.COMMIT_TOTAL_RETRY_TIME_MS;
import static org.apache.iceberg.TableProperties.COMMIT_TOTAL_RETRY_TIME_MS_DEFAULT;

import java.util.List;
import java.util.Map;
import java.util.Optional;
import org.apache.iceberg.exceptions.CommitFailedException;
import org.apache.iceberg.relocated.com.google.common.collect.Maps;
import org.apache.iceberg.util.Tasks;

public class SetStatistics implements UpdateStatistics {

private final TableOperations ops;
private final Map<Long, Optional<StatisticsFile>> statisticsToSet = Maps.newHashMap();
private TableMetadata base;

public SetStatistics(TableOperations ops) {
this.ops = ops;
this.base = ops.current();
}

@Override
Expand All @@ -45,17 +59,28 @@ public UpdateStatistics removeStatistics(long snapshotId) {

@Override
public List<StatisticsFile> apply() {
return internalApply(ops.current()).statisticsFiles();
return internalApply().statisticsFiles();
}

@Override
public void commit() {
TableMetadata base = ops.current();
TableMetadata newMetadata = internalApply(base);
ops.commit(base, newMetadata);
Tasks.foreach(ops)
.retry(base.propertyAsInt(COMMIT_NUM_RETRIES, COMMIT_NUM_RETRIES_DEFAULT))
.exponentialBackoff(
base.propertyAsInt(COMMIT_MIN_RETRY_WAIT_MS, COMMIT_MIN_RETRY_WAIT_MS_DEFAULT),
base.propertyAsInt(COMMIT_MAX_RETRY_WAIT_MS, COMMIT_MAX_RETRY_WAIT_MS_DEFAULT),
base.propertyAsInt(COMMIT_TOTAL_RETRY_TIME_MS, COMMIT_TOTAL_RETRY_TIME_MS_DEFAULT),
2.0 /* exponential */)
.onlyRetryOn(CommitFailedException.class)
.run(
item -> {
TableMetadata updated = internalApply();
ops.commit(base, updated);
});
}

private TableMetadata internalApply(TableMetadata base) {
private TableMetadata internalApply() {
this.base = ops.refresh();
TableMetadata.Builder builder = TableMetadata.buildFrom(base);
statisticsToSet.forEach(
(snapshotId, statistics) -> {
Expand Down
58 changes: 58 additions & 0 deletions core/src/test/java/org/apache/iceberg/TestSetStatistics.java
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Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,9 @@
package org.apache.iceberg;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;

import org.apache.iceberg.exceptions.CommitFailedException;
import org.apache.iceberg.relocated.com.google.common.collect.ImmutableList;
import org.apache.iceberg.relocated.com.google.common.collect.ImmutableMap;
import org.junit.jupiter.api.TestTemplate;
Expand Down Expand Up @@ -106,4 +108,60 @@ public void testRemoveStatistics() {
assertThat(version()).isEqualTo(3);
assertThat(metadata.statisticsFiles()).isEmpty();
}

@TestTemplate
public void testSetStatisticsRetryWithConcurrentModification() {
table.newFastAppend().appendFile(FILE_A).commit();
TableMetadata base = readMetadata();
long snapshotId = base.currentSnapshot().snapshotId();

GenericStatisticsFile statisticsFile =
new GenericStatisticsFile(
snapshotId, "/some/statistics/file.puffin", 100, 42, ImmutableList.of());

UpdateStatistics updateStats = table.updateStatistics().setStatistics(statisticsFile);

table.newFastAppend().appendFile(FILE_B).commit();

updateStats.commit();

assertThat(readMetadata().statisticsFiles()).containsExactly(statisticsFile);
}

@TestTemplate
public void testSetStatisticsRetryExhaustion() {
table.updateProperties().set(TableProperties.COMMIT_NUM_RETRIES, "2").commit();

table.newFastAppend().appendFile(FILE_A).commit();
long snapshotId = readMetadata().currentSnapshot().snapshotId();

GenericStatisticsFile statisticsFile =
new GenericStatisticsFile(
snapshotId, "/some/statistics/file.puffin", 100, 42, ImmutableList.of());

TestTables.TestTableOperations ops = table.ops();
ops.failCommits(3);
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@dramaticlly dramaticlly Jan 27, 2026

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nit, I think $maxAttempt+1 would be helpful here like

    ops.failCommits(TableProperties.COMMIT_NUM_RETRIES_DEFAULT + 1);


UpdateStatistics updateStats = table.updateStatistics().setStatistics(statisticsFile);
assertThatThrownBy(updateStats::commit)
.isInstanceOf(CommitFailedException.class)
.hasMessage("Injected failure");
}

@TestTemplate
public void testSetStatisticsRetrySuccess() {
table.newFastAppend().appendFile(FILE_A).commit();
long snapshotId = readMetadata().currentSnapshot().snapshotId();

GenericStatisticsFile statisticsFile =
new GenericStatisticsFile(
snapshotId, "/some/statistics/file.puffin", 100, 42, ImmutableList.of());

TestTables.TestTableOperations ops = table.ops();
ops.failCommits(2);

table.updateStatistics().setStatistics(statisticsFile).commit();

assertThat(readMetadata().statisticsFiles()).containsExactly(statisticsFile);
}
}