codelipenghui commented on a change in pull request #10650:
URL: https://github.com/apache/pulsar/pull/10650#discussion_r639493159



##########
File path: 
pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/v3/Transactions.java
##########
@@ -55,6 +55,55 @@ public void getCoordinatorStatus(@Suspended final 
AsyncResponse asyncResponse,
         internalGetCoordinatorStatus(asyncResponse, authoritative, 
coordinatorId);
     }
 
+    @GET
+    @Path("/transactionInBufferStats")
+    @ApiOperation(value = "Get transaction state in transaction buffer.")
+    @ApiResponses(value = {@ApiResponse(code = 403, message = "Don't have 
admin permission"),
+            @ApiResponse(code = 404, message = "Tenant or cluster or namespace 
or topic doesn't exist"),
+            @ApiResponse(code = 503, message = "This Broker is not configured "
+                    + "with transactionCoordinatorEnabled=true."),
+            @ApiResponse(code = 307, message = "Topic don't owner by this 
broker!"),
+            @ApiResponse(code = 501, message = "Topic is not a persistent 
topic!"),
+            @ApiResponse(code = 409, message = "Concurrent modification")})
+    public void getTransactionInBufferStats(@Suspended final AsyncResponse 
asyncResponse,
+                                            @QueryParam("authoritative")
+                                            @DefaultValue("false") boolean 
authoritative,
+                                            @QueryParam("mostSigBits")

Review comment:
       @eolivelli Currently all the txn Id in the admin API expressed as 
`mostSigBits` and `leastSigBits`. The client also can get the `mostSigBits` and 
`leastSigBits` of a transactionId when using the transactions. 




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