TEZ-4503: Warn about large conf properties in payload

Author: zabetak

tez-api/src/main/java/org/apache/tez/common/TezUtils.java

@@ -29,6 +29,7 @@
 import com.google.protobuf.ByteString;
 
 import com.google.protobuf.CodedInputStream;
+import org.apache.tez.dag.api.TezConfiguration;
 import org.apache.tez.runtime.api.TaskContext;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -43,6 +44,11 @@
 import org.xerial.snappy.SnappyInputStream;
 import org.xerial.snappy.SnappyOutputStream;
 
+import static org.apache.tez.dag.api.TezConfiguration.TEZ_LOGGING_PROPERTY_MASK;
+import static org.apache.tez.dag.api.TezConfiguration.TEZ_LOGGING_PROPERTY_MASK_DEFAULT;
+import static org.apache.tez.dag.api.TezConfiguration.TEZ_LOGGING_PROPERTY_SIZE_THRESHOLD;
+import static org.apache.tez.dag.api.TezConfiguration.TEZ_LOGGING_PROPERTY_SIZE_THRESHOLD_DEFAULT;
+
 /**
  * Utility methods for setting up a DAG. Has helpers for setting up log4j configuration, converting
  * {@link org.apache.hadoop.conf.Configuration} to {@link org.apache.tez.dag.api.UserPayload} etc.
@@ -51,6 +57,14 @@
 public final class TezUtils {
 
   private static final Logger LOG = LoggerFactory.getLogger(TezUtils.class);
+  private static final int PROPERTY_THRESHOLD;
+  private static final boolean PROPERTY_MASK;
+
+  static {
+    TezConfiguration c = new TezConfiguration();
+    PROPERTY_THRESHOLD = c.getInt(TEZ_LOGGING_PROPERTY_SIZE_THRESHOLD, TEZ_LOGGING_PROPERTY_SIZE_THRESHOLD_DEFAULT);
+    PROPERTY_MASK = c.getBoolean(TEZ_LOGGING_PROPERTY_MASK, TEZ_LOGGING_PROPERTY_MASK_DEFAULT);
+  }
 
   private TezUtils() {}
 
@@ -211,10 +225,19 @@ public static void populateConfProtoFromEntries(Iterable<Map.Entry<String, Strin
         kvp.setKey(key);
         kvp.setValue(val);
         confBuilder.addConfKeyValues(kvp);
+        logEntryIfLarge(key, val);
       } else {
         LOG.debug("null value for key={}. Skipping.", key);
       }
     }
   }
 
+  private static void logEntryIfLarge(String key, String value) {
+    if (value.length() > PROPERTY_THRESHOLD) {
+      LOG.warn("Property '{}' is unusually big ({} bytes); large payload may lead to OOM.", key, value.length());
+      if (!PROPERTY_MASK) {
+        LOG.warn("Large property '{}': {}", key, value);
+      }
+    }
+  }
 }

tez-api/src/main/java/org/apache/tez/dag/api/TezConfiguration.java

@@ -1580,6 +1580,26 @@ public TezConfiguration(boolean loadDefaults) {
       TEZ_PREFIX + "generate.debug.artifacts";
   public static final boolean TEZ_GENERATE_DEBUG_ARTIFACTS_DEFAULT = false;
 
+  /**
+   * Int value. Property size threshold (in bytes) for logging during payload serialization. Properties exceeding the
+   * threshold are considered unusually large and potentially problematic thus they should be logged.
+   */
+  @ConfigurationScope(Scope.VERTEX)
+  @ConfigurationProperty(type="integer")
+  public static final String TEZ_LOGGING_PROPERTY_SIZE_THRESHOLD =
+      TEZ_PREFIX + "logging.property.size.threshold";
+  public static final int TEZ_LOGGING_PROPERTY_SIZE_THRESHOLD_DEFAULT = 512 * 1024;
+  /**
+   * Boolean value. Whether property masking is enabled for logging. Properties may contain sensitive user information
+   * such as passwords, credentials, secrets, etc., so they shouldn't be logged unconditionally. When masking is
+   * enabled, the property value (content) is not displayed in the logs.
+   */
+  @ConfigurationScope(Scope.VERTEX)
+  @ConfigurationProperty
+  public static final String TEZ_LOGGING_PROPERTY_MASK =
+      TEZ_PREFIX + "logging.property.mask";
+  public static final boolean TEZ_LOGGING_PROPERTY_MASK_DEFAULT = true;
+
   /**
    * Set of tasks for which specific launch command options need to be added.
    * Format: "vertexName[csv of task ids];vertexName[csv of task ids].."