Examples of errors detected by the V6074 diagnostic

V6074. Non-atomic modification of volatile variable.

Apache Flink

V6074 Non-atomic modification of volatile variable. Inspect 'currentNumAcknowledgedSubtasks'. PendingCheckpointStats.java(131)

boolean reportSubtaskStats(JobVertexID jobVertexId, SubtaskStateStats subtask) {
  TaskStateStats taskStateStats = taskStats.get(jobVertexId);

  if (taskStateStats != null && taskStateStats.reportSubtaskStats(subtask)) {
    currentNumAcknowledgedSubtasks++;                // <=
    latestAcknowledgedSubtask = subtask;

    currentStateSize += subtask.getStateSize();      // <=

    long processedData = subtask.getProcessedData();
    if (processedData > 0) {
      currentProcessedData += processedData;         // <=
    }

    long persistedData = subtask.getPersistedData();
    if (persistedData > 0) {
      currentPersistedData += persistedData;         // <=
    }
    return true;
  } else {
    return false;
  }
}

Similar errors can be found in some other places:

• V6074 Non-atomic modification of volatile variable. Inspect 'currentStateSize'. PendingCheckpointStats.java(134)
• V6074 Non-atomic modification of volatile variable. Inspect 'currentProcessedData'. PendingCheckpointStats.java(138)
• V6074 Non-atomic modification of volatile variable. Inspect 'currentPersistedData'. PendingCheckpointStats.java(143)

DBeaver

V6074 Non-atomic modification of volatile variable. Inspect 'runningOperations'. MultiPageWizardDialog.java(590)

public class MultiPageWizardDialog extends .... {
    ....
    private volatile int runningOperations = 0;

    ....

    @Override
    public void run(....) {
        ....
        try {
            runningOperations++;               // <=
            ModalContext.run(
               runnable,
               true,
               monitorPart,
               getShell().getDisplay()
            );
        } finally {
            runningOperations--;               // <=
            ....
        }
    }
}

Similar errors can be found in some other places:

• V6074 Non-atomic modification of volatile variable. Inspect 'runningOperations'. MultiPageWizardDialog.java(593)

DBeaver

V6074 Non-atomic modification of volatile variable. Inspect 'drawCount'. ProgressLoaderVisualizer.java(192)

private volatile int drawCount = 0;

....

private void showProgress() {
    if (loadStartTime == 0) {
        return;
    }
    if (progressOverlay == null) {
        ....
        painListener = e -> {
            ....
            Image image = DBeaverIcons.getImage(
                PROGRESS_IMAGES[drawCount % PROGRESS_IMAGES.length]
            );
            ....
        };
        ....
    }
    drawCount++;
    ....
}

DBeaver

V6074 Non-atomic modification of volatile variable. Inspect 'initializedCount'. CompareObjectsExecutor.java(130)

private volatile int initializedCount = 0;

....
public CompareObjectsExecutor(CompareObjectsSettings settings)
{
    ....
    initializeFinisher = new DBRProgressListener() {
        @Override
        public void onTaskFinished(IStatus status)
        {
            if (!status.isOK()) {
                initializeError = status;
            } else {
                initializedCount++;
            }
        }
    };
    ....
}