Thank you for the reply. You are right. The function used to initially get the set returns an unmodifiableSet. That is the reason for the error. However, when we use a Map as a field and initially write an unmodifiableMap, we can still modify the Map using getField.
The code is like how we use the Set: BinaryObjectBuilder boBuilder = bo.toBuilder(); Map<String, String> meta = boBuilder.getField(meta_FieldStr); meta.put(key, value); boBuilder.setField(meta_FieldStr, meta, Map.class); What is the difference between Map and Set here? Thanks, Cong -----Original Message----- From: vkulichenko [mailto:valentin.kuliche...@gmail.com] Sent: 2018年7月23日 17:16 To: user@ignite.apache.org Subject: Re: UnsupportedOperationException when updating a field in binary object This test stops working though if you replace line 30 with this: builder.setField("set", Collections.unmodifiableSet(Sets.newHashSet("a", "b", "c"))); If unmodifiable set is written, it's then read as unmodifiable set as well, and therefore can't be modified. I believe this is the reason for the error. -Val -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/
