Hi Viktor, If I'm reading the KIP right, it looks like the new proposed verison of AlterConfigs sets an OperationType on a per-config basis:
> AlterConfigs Request (Version: 1) => [resources] validate_only > validate_only => BOOLEAN > resources => resource_type resource_name [configs] > resource_type => INT8 > resource_name => STRING > configs => config_name config_value config_operation > config_name => STRING > config_value => STRING > config_operation => INT8 [NEW ADDITION] > > Request Semantics: > > By default in the broker we parse an AlterConfigRequest version 0 > with Unknown operation and handle it with the currently existing behavior. > Version 1 requests however must have the operation set to other than > Unknown, otherwise an InvalidRequestException will be thrown. > Set operation also does Add if needed to be backward compatible > with the existing ConfigCommand semantics. However, this seems like a configuration that should be global to the whole AlterConfigs request, right? It doesn't make sense to have one configuration key use AlterOperation.Set and the other use AlterOperation.Add -- the Set one specifies that we should overwrite the whole node in ZK. Another consideration here is that we should do this in a compatible fashion in AdminClient. Existing code that relies on the "set everything" behavior should not break. The best way to do this is to add a boolean to ./clients/src/main/java/org/apache/kafka/clients/admin/AlterConfigsOptions.java , specifying whether we want to clear everything that hasn't been specified, or not. This should default to true so that existing code can continue to work.... Unless we believe that the existing AlterConfigs behavior is so broken that it should be changed, even in a compatibility-breaking way. Similarly, for other tools, we managed to support both the zookeeper-based way and the new way in the same tool for a while. This seems like something users would really want-- is it truly infeasible to do here? The Java code could call into the Scala code as necessary when the zk flag was specified, right? best, Colin On Thu, Apr 26, 2018, at 01:47, Magnus Edenhill wrote: > Hi Viktor, > > after speaking to Rajini it seems like this KIP will allow clients to > perform incremental configuration updates with AlterConfigs, only providing > the settings > that it wants to change, as opposed to the current atomic behaviour where > all settings > need to be provided to avoid having them revert to their default values. > > If this is indeed the case, could you update the KIP to make this more > clear? > I.e., that using Version 1 of AlterConfigs has the incremental behaviour, > while > version 0 is atomic. > > Thanks, > Magnus > > > > > 2018-04-16 13:27 GMT+02:00 Viktor Somogyi <viktorsomo...@gmail.com>: > > > Hi Rajini, > > > > The current ConfigCommand would still be possible to use, therefore those > > who wish to set up SCRAM or initial quotas would be able to continue doing > > it through kafka-run-class.sh. > > In an ideal world I'd keep it in the current ConfigCommand command so we > > wouldn't mix the zookeeper and admin client configs. Perhaps I could create > > a kafka-configs-zookeeper.sh shell script for shortening the > > kafka-run-class command. > > What do you and others think? > > > > Thanks, > > Viktor > > > > > > > > On Mon, Apr 16, 2018 at 10:15 AM, Rajini Sivaram <rajinisiva...@gmail.com> > > wrote: > > > > > Hi Viktor, > > > > > > The KIP proposes to remove the ability to configure using ZooKeeper. This > > > means we will no longer have the ability to start up a cluster with SCRAM > > > credentials since we first need to create SCRAM credentials before > > brokers > > > can start if the broker uses SCRAM for inter-broker communication and we > > > need SCRAM credentials for the AdminClient before we can create new ones. > > > For quotas as well, we will no longer be able to configure quotas until > > at > > > least one broker has been started. Perhaps, we ought to retain the > > ability > > > to configure using ZooKeeper for these initialization scenarios and > > support > > > only AdminClient for dynamic updates? > > > > > > What do others think? > > > > > > Regards, > > > > > > Rajini > > > > > > On Sun, Apr 15, 2018 at 10:28 AM, Ted Yu <yuzhih...@gmail.com> wrote: > > > > > > > +1 > > > > -------- Original message --------From: zhenya Sun <toke...@126.com> > > > > Date: 4/15/18 12:42 AM (GMT-08:00) To: dev <dev@kafka.apache.org> > > Cc: > > > > dev <dev@kafka.apache.org> Subject: Re: [VOTE] #2 KIP-248: Create New > > > > ConfigCommand That Uses The New AdminClient > > > > non-binding +1 > > > > > > > > > > > > > > > > > > > > > > > > from my iphone！ > > > > On 04/15/2018 15:41, Attila Sasvári wrote: > > > > Thanks for updating the KIP. > > > > > > > > +1 (non-binding) > > > > > > > > Viktor Somogyi <viktorsomo...@gmail.com> ezt írta (időpont: 2018. ápr. > > > 9., > > > > H 16:49): > > > > > > > > > Hi Magnus, > > > > > > > > > > Thanks for the heads up, added the endianness to the KIP. Here is the > > > > > current text: > > > > > > > > > > "Double > > > > > A new type needs to be added to transfer quota values. Since the > > > protocol > > > > > classes in Kafka already uses ByteBuffers it is logical to use their > > > > > functionality for serializing doubles. The serialization is > > basically a > > > > > representation of the specified floating-point value according to the > > > > IEEE > > > > > 754 floating-point "double format" bit layout. The ByteBuffer > > > serializer > > > > > writes eight bytes containing the given double value, in Big Endian > > > byte > > > > > order, into this buffer at the current position, and then increments > > > the > > > > > position by eight. > > > > > > > > > > The implementation will be defined in > > > > > org.apache.kafka.common.protocol.types with the other protocol types > > > > and it > > > > > will have no default value much like the other types available in the > > > > > protocol." > > > > > > > > > > Also, I haven't changed the protocol docs yet but will do so in my PR > > > for > > > > > this feature. > > > > > > > > > > Let me know if you'd still add something. > > > > > > > > > > Regards, > > > > > Viktor > > > > > > > > > > > > > > > On Mon, Apr 9, 2018 at 3:32 PM, Magnus Edenhill <mag...@edenhill.se> > > > > > wrote: > > > > > > > > > > > Hi Viktor, > > > > > > > > > > > > since serialization of floats isn't as straight forward as > > integers, > > > > > please > > > > > > specify the exact serialization format of DOUBLE in the protocol > > docs > > > > > > (e.g., IEEE 754), > > > > > > including endianness (big-endian please). > > > > > > > > > > > > This will help the non-java client ecosystem. > > > > > > > > > > > > Thanks, > > > > > > Magnus > > > > > > > > > > > > > > > > > > 2018-04-09 15:16 GMT+02:00 Viktor Somogyi <viktorsomo...@gmail.com > > >: > > > > > > > > > > > > > Hi Attila, > > > > > > > > > > > > > > 1. It uses ByteBuffers, which in turn will use > > > > Double.doubleToLongBits > > > > > to > > > > > > > convert the double value to a long and that long will be written > > in > > > > the > > > > > > > buffer. I'v updated the KIP with this. > > > > > > > 2. Good idea, modified it. > > > > > > > 3. During the discussion I remember we didn't really decide which > > > one > > > > > > would > > > > > > > be the better one but I agree that a wrapper class that makes > > sure > > > > the > > > > > > list > > > > > > > that is used as a key is immutable is a good idea and would ease > > > the > > > > > life > > > > > > > of people using the interface. Also more importantly would make > > > sure > > > > > that > > > > > > > we always use the same hashCode. I have created wrapper classes > > for > > > > the > > > > > > map > > > > > > > value as well but that was reverted to keep things consistent. > > > > Although > > > > > > for > > > > > > > the key I think we wouldn't break consistency. I updated the KIP. > > > > > > > > > > > > > > Thanks, > > > > > > > Viktor > > > > > > > > > > > > > > > > > > > > > On Tue, Apr 3, 2018 at 1:27 PM, Attila Sasvári < > > > asasv...@apache.org> > > > > > > > wrote: > > > > > > > > > > > > > > > Thanks for working on it Viktor. > > > > > > > > > > > > > > > > It looks good to me, but I have some questions: > > > > > > > > - I see a new type DOUBLE is used for quota_value , and it is > > not > > > > > > listed > > > > > > > > among the primitive types on the Kafka protocol guide. Can you > > > add > > > > > some > > > > > > > > more details? > > > > > > > > - I am not sure that using an environment (i.e. > > > > > > USE_OLD_COMMAND)variable > > > > > > > is > > > > > > > > the best way to control behaviour of kafka-config.sh . In other > > > > > scripts > > > > > > > > (e.g. console-consumer) an argument is passed (e.g. > > > > --new-consumer). > > > > > If > > > > > > > we > > > > > > > > still want to use it, then I would suggest something like > > > > > > > > USE_OLD_KAFKA_CONFIG_COMMAND. What do you think? > > > > > > > > - I have seen maps like Map<List<ConfigResource>, > > > > > > Collection<QuotaType>>. > > > > > > > > If List<ConfigResource> is the key type, you should make sure > > > that > > > > > this > > > > > > > > List is immutable. Have you considered to introduce a new > > wrapper > > > > > > class? > > > > > > > > > > > > > > > > Regards, > > > > > > > > - Attila > > > > > > > > > > > > > > > > On Thu, Mar 29, 2018 at 1:46 PM, zhenya Sun <toke...@126.com> > > > > wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > +1 （non-binding） > > > > > > > > > > > > > > > > > > > > > > > > > > > | | > > > > > > > > > zhenya Sun > > > > > > > > > 邮箱：toke...@126.com > > > > > > > > > | > > > > > > > > > > > > > > > > > > 签名由 网易邮箱大师 定制 > > > > > > > > > > > > > > > > > > On 03/29/2018 19:40, Sandor Murakozi wrote: > > > > > > > > > +1 (non-binding) > > > > > > > > > > > > > > > > > > Thanks for the KIP, Viktor > > > > > > > > > > > > > > > > > > On Wed, Mar 21, 2018 at 5:41 PM, Viktor Somogyi < > > > > > > > viktorsomo...@gmail.com > > > > > > > > > > > > > > > > > > wrote: > > > > > > > > > > > > > > > > > > > Hi Everyone, > > > > > > > > > > > > > > > > > > > > I've started a vote on KIP-248 > > > > > > > > > > <https://cwiki.apache.org/confluence/display/KAFKA/KIP- > > > > > > > > 248+-+Create+New+ > > > > > > > > > > ConfigCommand+That+Uses+The+New+AdminClient#KIP-248- > > > > > > > > > > CreateNewConfigCommandThatUsesTheNewAdminClient- > > > > DescribeQuotas> > > > > > > > > > > a few weeks ago but at the time I got a couple more > > comments > > > > and > > > > > it > > > > > > > was > > > > > > > > > > very close to 1.1 feature freeze, people were occupied with > > > > that, > > > > > > so > > > > > > > I > > > > > > > > > > wanted to restart the vote on this. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > *Summary of the KIP* > > > > > > > > > > For those who don't have context I thought I'd summarize it > > > in > > > > a > > > > > > few > > > > > > > > > > sentence. > > > > > > > > > > *Problem & Motivation: *The basic problem that the KIP > > tries > > > to > > > > > > solve > > > > > > > > is > > > > > > > > > > that kafka-configs.sh (which in turn uses the ConfigCommand > > > > > class) > > > > > > > uses > > > > > > > > a > > > > > > > > > > direct zookeeper connection. This is not desirable as > > getting > > > > > > around > > > > > > > > the > > > > > > > > > > broker opens up security issues and prevents the tool from > > > > being > > > > > > used > > > > > > > > in > > > > > > > > > > deployments where only the brokers are exposed to clients. > > > > Also a > > > > > > > > somewhat > > > > > > > > > > smaller motivation is to rewrite the tool in java as part > > of > > > > the > > > > > > > tools > > > > > > > > > > component so we can get rid of requiring the core module on > > > the > > > > > > > > classpath > > > > > > > > > > for the kafka-configs tool. > > > > > > > > > > *Solution:* > > > > > > > > > > - I've designed new 2 protocols: DescribeQuotas and > > > > AlterQuotas. > > > > > > > > > > - Also redesigned the output format of the command line > > tool > > > so > > > > > it > > > > > > > > provides > > > > > > > > > > a nicer result. > > > > > > > > > > - kafka-configs.[sh/bat] will use a new java based > > > > ConfigCommand > > > > > > that > > > > > > > > is > > > > > > > > > > placed in tools. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > I'd be happy to receive any votes or feedback on this. > > > > > > > > > > > > > > > > > > > > Regards, > > > > > > > > > > Viktor > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >
