Force log flush at the end of a command execution.

--
MOS_MIGRATED_REVID=88160544

1 files changed, 9 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/runtime/BlazeRuntime.java b/src/main/java/com/google/devtools/build/lib/runtime/BlazeRuntime.java
index dddc006a4d..d911820c37 100644
--- a/src/main/java/com/google/devtools/build/lib/runtime/BlazeRuntime.java
+++ b/src/main/java/com/google/devtools/build/lib/runtime/BlazeRuntime.java
@@ -140,6 +140,7 @@ import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
+import java.util.logging.Handler;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.regex.Pattern;
@@ -828,6 +829,14 @@ public final class BlazeRuntime {
     } catch (IOException e) {
       getReporter().handle(Event.error("Error while writing profile file: " + e.getMessage()));
     }
+
+    // If this is not a crash we flush the log after the command finishes.
+    if (exitCode < 30) {
+      LOG.info("Forcing flush of the logs");
+      for (Handler handler : Logger.getLogger("").getHandlers()) {
+        handler.flush();
+      }
+    }
   }
 
   // Make sure we keep a strong reference to this logger, so that the