@edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "IS2_INCONSISTENT_SYNC",
      justification = "Presume the lock on processing request held by caller is protection enough")
  @Override
  public void done() {
    if (this.cellBlockStream != null) {
      // This will return back the BBs which we got from pool.
      this.cellBlockStream.releaseResources();
      this.cellBlockStream = null;
    }
    // If the call was run successfuly, we might have already returned the BB
    // back to pool. No worries..Then inputCellBlock will be null
    cleanup();
    span.end();
  }
Call is done. Execution happened and we returned results to client. It is now safe to cleanup.
hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/ServerCall.java