diff --git a/src/main/java/com/google/devtools/build/lib/bazel/SpawnLogModule.java b/src/main/java/com/google/devtools/build/lib/bazel/SpawnLogModule.java
index 3f8faf797b0f06..f62c1754af3357 100644
--- a/src/main/java/com/google/devtools/build/lib/bazel/SpawnLogModule.java
+++ b/src/main/java/com/google/devtools/build/lib/bazel/SpawnLogModule.java
@@ -111,7 +111,8 @@ private void initOutputs(CommandEnvironment env) throws IOException {
                     .experimentalSiblingRepositoryLayout,
                 env.getOptions().getOptions(RemoteOptions.class),
                 env.getRuntime().getFileSystem().getDigestFunction(),
-                env.getXattrProvider());
+                env.getXattrProvider(),
+                env.getCommandId());
       } catch (InterruptedException e) {
         env.getReporter()
             .handle(Event.error("Error while setting up the execution log: " + e.getMessage()));
diff --git a/src/main/java/com/google/devtools/build/lib/exec/CompactSpawnLogContext.java b/src/main/java/com/google/devtools/build/lib/exec/CompactSpawnLogContext.java
index 9d71d98ede8982..d41382451e2434 100644
--- a/src/main/java/com/google/devtools/build/lib/exec/CompactSpawnLogContext.java
+++ b/src/main/java/com/google/devtools/build/lib/exec/CompactSpawnLogContext.java
@@ -63,6 +63,7 @@
 import java.util.Comparator;
 import java.util.List;
 import java.util.SortedMap;
+import java.util.UUID;
 import java.util.concurrent.ForkJoinPool;
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.GuardedBy;
@@ -143,6 +144,7 @@ private interface ExecLogEntrySupplier {
   @Nullable private final RemoteOptions remoteOptions;
   private final DigestHashFunction digestHashFunction;
   private final XattrProvider xattrProvider;
+  private final UUID invocationId;
 
   // Maps a key identifying an entry into its ID.
   // Each key is either a NestedSet.Node or the String path of a file, directory, symlink or
@@ -166,7 +168,8 @@ public CompactSpawnLogContext(
       boolean siblingRepositoryLayout,
       @Nullable RemoteOptions remoteOptions,
       DigestHashFunction digestHashFunction,
-      XattrProvider xattrProvider)
+      XattrProvider xattrProvider,
+      UUID invocationId)
       throws IOException, InterruptedException {
     this.execRoot = execRoot;
     this.workspaceName = workspaceName;
@@ -174,6 +177,7 @@ public CompactSpawnLogContext(
     this.remoteOptions = remoteOptions;
     this.digestHashFunction = digestHashFunction;
     this.xattrProvider = xattrProvider;
+    this.invocationId = invocationId;
     this.outputStream = getOutputStream(outputPath);
 
     logInvocation();
@@ -194,7 +198,8 @@ private void logInvocation() throws IOException, InterruptedException {
                     ExecLogEntry.Invocation.newBuilder()
                         .setHashFunctionName(digestHashFunction.toString())
                         .setWorkspaceRunfilesDirectory(workspaceName)
-                        .setSiblingRepositoryLayout(siblingRepositoryLayout)));
+                        .setSiblingRepositoryLayout(siblingRepositoryLayout)
+                        .setId(invocationId.toString())));
   }
 
   @Override
diff --git a/src/main/protobuf/spawn.proto b/src/main/protobuf/spawn.proto
index dda2af3955c0d9..d9d7576e39b353 100644
--- a/src/main/protobuf/spawn.proto
+++ b/src/main/protobuf/spawn.proto
@@ -232,6 +232,9 @@ message ExecLogEntry {
 
     // Whether --experimental_sibling_repository_layout is enabled.
     bool sibling_repository_layout = 3;
+
+    // The ID of the invocation.
+    string id = 4;
   }
 
   // An input or output file.
diff --git a/src/test/java/com/google/devtools/build/lib/exec/CompactSpawnLogContextTest.java b/src/test/java/com/google/devtools/build/lib/exec/CompactSpawnLogContextTest.java
index 1d73141cc85eba..f3e5be78a3fad0 100644
--- a/src/test/java/com/google/devtools/build/lib/exec/CompactSpawnLogContextTest.java
+++ b/src/test/java/com/google/devtools/build/lib/exec/CompactSpawnLogContextTest.java
@@ -47,6 +47,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
+import java.util.UUID;
 import net.starlark.java.syntax.Location;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -144,7 +145,8 @@ public void testSymlinkAction() throws IOException, InterruptedException {
                     Protos.ExecLogEntry.Invocation.newBuilder()
                         .setHashFunctionName("SHA-256")
                         .setWorkspaceRunfilesDirectory(TestConstants.WORKSPACE_NAME)
-                        .setSiblingRepositoryLayout(siblingRepositoryLayout))
+                        .setSiblingRepositoryLayout(siblingRepositoryLayout)
+                        .setId("00000000-0000-0000-0000-000000000000"))
                 .build(),
             Protos.ExecLogEntry.newBuilder()
                 .setSymlinkAction(
@@ -244,7 +246,8 @@ protected SpawnLogContext createSpawnLogContext(ImmutableMap<String, String> pla
         siblingRepositoryLayout,
         remoteOptions,
         DigestHashFunction.SHA256,
-        SyscallCache.NO_CACHE);
+        SyscallCache.NO_CACHE,
+        UUID.fromString("00000000-0000-0000-0000-000000000000"));
   }
 
   @Override