Re: Time to address the Guava version problem
I've a patch for HADOOP-11102 which rolls curator back to v 2.4.1, which only pulls in Guava 14...hadoop should now be weakly consistent -at least not strongly inconsistent- in its guava versions. allowing hadoop to work on 16.x while still remaining compatible with 11.x is still something to work on -there's some patches there already On 24 September 2014 07:35, Billie Rinaldi billie.rina...@gmail.com wrote: The use of an unnecessarily old dependency encourages problems like HDFS-7040. The current Guava dependency is a big problem for downstream apps and I'd really like to see it addressed. On Tue, Sep 23, 2014 at 2:09 PM, Steve Loughran ste...@hortonworks.com wrote: I'm using curator elsewhere, it does log a lot (as does the ZK client), but it solves a lot of problem. It's being adopted more downstream too. I'm wondering if we can move the code to the extent we know it works with Guava 16, with the hadoop core being 16-compatible, but not actually migrated to 16.x only. Then hadoop ships with 16 for curator downstream apps, but we say you can probably roll back to 11 provided you don't use features x-y-z. On 23 September 2014 21:55, Robert Kanter rkan...@cloudera.com wrote: At the same time, not being able to use Curator will require a lot of extra code, a lot of which we probably already have from the ZKRMStateStore, but it's not available to use in hadoop-auth. We'd need to create our own ZK libraries that Hadoop components can use, but (a) that's going to take a while, and (b) it seems silly to reinvent the wheel when Curator already does all this. I agree that upgrading Guava will be a compatibility problem though... On Tue, Sep 23, 2014 at 9:30 AM, Sandy Ryza sandy.r...@cloudera.com wrote: If we've broken compatibility in branch-2, that's a bug that we need to fix. HADOOP-10868 has not yet made it into a release; I don't see it as a justification for solidifying the breakage. -1 to upgrading Guava in branch-2. On Tue, Sep 23, 2014 at 3:06 AM, Steve Loughran ste...@hortonworks.com wrote: +1 to upgrading guava. Irrespective of downstream apps, the hadoop source tree is now internally inconsistent On 22 September 2014 17:56, Sangjin Lee sj...@apache.org wrote: I agree that a more robust solution is to have better classloading isolation. Still, IMHO guava (and possibly protobuf as well) sticks out like a sore thumb. There are just too many issues in trying to support both guava 11 and guava 16. Independent of what we may do with the classloading isolation, we should still consider upgrading guava. My 2 cents. On Sun, Sep 21, 2014 at 3:11 PM, Karthik Kambatla ka...@cloudera.com wrote: Upgrading Guava version is tricky. While it helps in many cases, it can break existing applications/deployments. I understand we do not have a policy for updating dependencies, but still we should be careful with Guava. I would be more inclined towards a more permanent solution to this problem - how about prioritizing classpath isolation so applications aren't affected by Hadoop dependency updates at all? I understand that will also break user applications, but it might be the driving feature for Hadoop 3.0? On Fri, Sep 19, 2014 at 5:13 PM, Sangjin Lee sj...@apache.org wrote: I would also agree on upgrading guava. Yes I am aware of the potential impact on customers who might rely on hadoop bringing in guava 11. However, IMHO the balance tipped over to the other side a while ago; i.e. I think there are far more people using guava 16 in their code and scrambling to make things work than the other way around. On Thu, Sep 18, 2014 at 2:40 PM, Steve Loughran ste...@hortonworks.com wrote: I know we've been ignoring the Guava version problem, but HADOOP-10868 added a transitive dependency on Guava 16 by way of Curator 2.6. Maven currently forces the build to use Guava 11.0.2, but this is hiding at compile timeall code paths from curator which may use classes methods that aren't there. I need curator for my own work (2.4.1 Guava 14.0 was what I'd been using), so don't think we can go back. HADOOP-11102 covers the problem -but doesn't propose a specific solution. But to me the one that seems most likely to work is: update Guava -steve -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual
Re: Time to address the Guava version problem
The use of an unnecessarily old dependency encourages problems like HDFS-7040. The current Guava dependency is a big problem for downstream apps and I'd really like to see it addressed. On Tue, Sep 23, 2014 at 2:09 PM, Steve Loughran ste...@hortonworks.com wrote: I'm using curator elsewhere, it does log a lot (as does the ZK client), but it solves a lot of problem. It's being adopted more downstream too. I'm wondering if we can move the code to the extent we know it works with Guava 16, with the hadoop core being 16-compatible, but not actually migrated to 16.x only. Then hadoop ships with 16 for curator downstream apps, but we say you can probably roll back to 11 provided you don't use features x-y-z. On 23 September 2014 21:55, Robert Kanter rkan...@cloudera.com wrote: At the same time, not being able to use Curator will require a lot of extra code, a lot of which we probably already have from the ZKRMStateStore, but it's not available to use in hadoop-auth. We'd need to create our own ZK libraries that Hadoop components can use, but (a) that's going to take a while, and (b) it seems silly to reinvent the wheel when Curator already does all this. I agree that upgrading Guava will be a compatibility problem though... On Tue, Sep 23, 2014 at 9:30 AM, Sandy Ryza sandy.r...@cloudera.com wrote: If we've broken compatibility in branch-2, that's a bug that we need to fix. HADOOP-10868 has not yet made it into a release; I don't see it as a justification for solidifying the breakage. -1 to upgrading Guava in branch-2. On Tue, Sep 23, 2014 at 3:06 AM, Steve Loughran ste...@hortonworks.com wrote: +1 to upgrading guava. Irrespective of downstream apps, the hadoop source tree is now internally inconsistent On 22 September 2014 17:56, Sangjin Lee sj...@apache.org wrote: I agree that a more robust solution is to have better classloading isolation. Still, IMHO guava (and possibly protobuf as well) sticks out like a sore thumb. There are just too many issues in trying to support both guava 11 and guava 16. Independent of what we may do with the classloading isolation, we should still consider upgrading guava. My 2 cents. On Sun, Sep 21, 2014 at 3:11 PM, Karthik Kambatla ka...@cloudera.com wrote: Upgrading Guava version is tricky. While it helps in many cases, it can break existing applications/deployments. I understand we do not have a policy for updating dependencies, but still we should be careful with Guava. I would be more inclined towards a more permanent solution to this problem - how about prioritizing classpath isolation so applications aren't affected by Hadoop dependency updates at all? I understand that will also break user applications, but it might be the driving feature for Hadoop 3.0? On Fri, Sep 19, 2014 at 5:13 PM, Sangjin Lee sj...@apache.org wrote: I would also agree on upgrading guava. Yes I am aware of the potential impact on customers who might rely on hadoop bringing in guava 11. However, IMHO the balance tipped over to the other side a while ago; i.e. I think there are far more people using guava 16 in their code and scrambling to make things work than the other way around. On Thu, Sep 18, 2014 at 2:40 PM, Steve Loughran ste...@hortonworks.com wrote: I know we've been ignoring the Guava version problem, but HADOOP-10868 added a transitive dependency on Guava 16 by way of Curator 2.6. Maven currently forces the build to use Guava 11.0.2, but this is hiding at compile timeall code paths from curator which may use classes methods that aren't there. I need curator for my own work (2.4.1 Guava 14.0 was what I'd been using), so don't think we can go back. HADOOP-11102 covers the problem -but doesn't propose a specific solution. But to me the one that seems most likely to work is: update Guava -steve -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete
Re: Time to address the Guava version problem
+1 to upgrading guava. Irrespective of downstream apps, the hadoop source tree is now internally inconsistent On 22 September 2014 17:56, Sangjin Lee sj...@apache.org wrote: I agree that a more robust solution is to have better classloading isolation. Still, IMHO guava (and possibly protobuf as well) sticks out like a sore thumb. There are just too many issues in trying to support both guava 11 and guava 16. Independent of what we may do with the classloading isolation, we should still consider upgrading guava. My 2 cents. On Sun, Sep 21, 2014 at 3:11 PM, Karthik Kambatla ka...@cloudera.com wrote: Upgrading Guava version is tricky. While it helps in many cases, it can break existing applications/deployments. I understand we do not have a policy for updating dependencies, but still we should be careful with Guava. I would be more inclined towards a more permanent solution to this problem - how about prioritizing classpath isolation so applications aren't affected by Hadoop dependency updates at all? I understand that will also break user applications, but it might be the driving feature for Hadoop 3.0? On Fri, Sep 19, 2014 at 5:13 PM, Sangjin Lee sj...@apache.org wrote: I would also agree on upgrading guava. Yes I am aware of the potential impact on customers who might rely on hadoop bringing in guava 11. However, IMHO the balance tipped over to the other side a while ago; i.e. I think there are far more people using guava 16 in their code and scrambling to make things work than the other way around. On Thu, Sep 18, 2014 at 2:40 PM, Steve Loughran ste...@hortonworks.com wrote: I know we've been ignoring the Guava version problem, but HADOOP-10868 added a transitive dependency on Guava 16 by way of Curator 2.6. Maven currently forces the build to use Guava 11.0.2, but this is hiding at compile timeall code paths from curator which may use classes methods that aren't there. I need curator for my own work (2.4.1 Guava 14.0 was what I'd been using), so don't think we can go back. HADOOP-11102 covers the problem -but doesn't propose a specific solution. But to me the one that seems most likely to work is: update Guava -steve -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You. -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
Re: Time to address the Guava version problem
If we've broken compatibility in branch-2, that's a bug that we need to fix. HADOOP-10868 has not yet made it into a release; I don't see it as a justification for solidifying the breakage. -1 to upgrading Guava in branch-2. On Tue, Sep 23, 2014 at 3:06 AM, Steve Loughran ste...@hortonworks.com wrote: +1 to upgrading guava. Irrespective of downstream apps, the hadoop source tree is now internally inconsistent On 22 September 2014 17:56, Sangjin Lee sj...@apache.org wrote: I agree that a more robust solution is to have better classloading isolation. Still, IMHO guava (and possibly protobuf as well) sticks out like a sore thumb. There are just too many issues in trying to support both guava 11 and guava 16. Independent of what we may do with the classloading isolation, we should still consider upgrading guava. My 2 cents. On Sun, Sep 21, 2014 at 3:11 PM, Karthik Kambatla ka...@cloudera.com wrote: Upgrading Guava version is tricky. While it helps in many cases, it can break existing applications/deployments. I understand we do not have a policy for updating dependencies, but still we should be careful with Guava. I would be more inclined towards a more permanent solution to this problem - how about prioritizing classpath isolation so applications aren't affected by Hadoop dependency updates at all? I understand that will also break user applications, but it might be the driving feature for Hadoop 3.0? On Fri, Sep 19, 2014 at 5:13 PM, Sangjin Lee sj...@apache.org wrote: I would also agree on upgrading guava. Yes I am aware of the potential impact on customers who might rely on hadoop bringing in guava 11. However, IMHO the balance tipped over to the other side a while ago; i.e. I think there are far more people using guava 16 in their code and scrambling to make things work than the other way around. On Thu, Sep 18, 2014 at 2:40 PM, Steve Loughran ste...@hortonworks.com wrote: I know we've been ignoring the Guava version problem, but HADOOP-10868 added a transitive dependency on Guava 16 by way of Curator 2.6. Maven currently forces the build to use Guava 11.0.2, but this is hiding at compile timeall code paths from curator which may use classes methods that aren't there. I need curator for my own work (2.4.1 Guava 14.0 was what I'd been using), so don't think we can go back. HADOOP-11102 covers the problem -but doesn't propose a specific solution. But to me the one that seems most likely to work is: update Guava -steve -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You. -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
Re: Time to address the Guava version problem
At the same time, not being able to use Curator will require a lot of extra code, a lot of which we probably already have from the ZKRMStateStore, but it's not available to use in hadoop-auth. We'd need to create our own ZK libraries that Hadoop components can use, but (a) that's going to take a while, and (b) it seems silly to reinvent the wheel when Curator already does all this. I agree that upgrading Guava will be a compatibility problem though... On Tue, Sep 23, 2014 at 9:30 AM, Sandy Ryza sandy.r...@cloudera.com wrote: If we've broken compatibility in branch-2, that's a bug that we need to fix. HADOOP-10868 has not yet made it into a release; I don't see it as a justification for solidifying the breakage. -1 to upgrading Guava in branch-2. On Tue, Sep 23, 2014 at 3:06 AM, Steve Loughran ste...@hortonworks.com wrote: +1 to upgrading guava. Irrespective of downstream apps, the hadoop source tree is now internally inconsistent On 22 September 2014 17:56, Sangjin Lee sj...@apache.org wrote: I agree that a more robust solution is to have better classloading isolation. Still, IMHO guava (and possibly protobuf as well) sticks out like a sore thumb. There are just too many issues in trying to support both guava 11 and guava 16. Independent of what we may do with the classloading isolation, we should still consider upgrading guava. My 2 cents. On Sun, Sep 21, 2014 at 3:11 PM, Karthik Kambatla ka...@cloudera.com wrote: Upgrading Guava version is tricky. While it helps in many cases, it can break existing applications/deployments. I understand we do not have a policy for updating dependencies, but still we should be careful with Guava. I would be more inclined towards a more permanent solution to this problem - how about prioritizing classpath isolation so applications aren't affected by Hadoop dependency updates at all? I understand that will also break user applications, but it might be the driving feature for Hadoop 3.0? On Fri, Sep 19, 2014 at 5:13 PM, Sangjin Lee sj...@apache.org wrote: I would also agree on upgrading guava. Yes I am aware of the potential impact on customers who might rely on hadoop bringing in guava 11. However, IMHO the balance tipped over to the other side a while ago; i.e. I think there are far more people using guava 16 in their code and scrambling to make things work than the other way around. On Thu, Sep 18, 2014 at 2:40 PM, Steve Loughran ste...@hortonworks.com wrote: I know we've been ignoring the Guava version problem, but HADOOP-10868 added a transitive dependency on Guava 16 by way of Curator 2.6. Maven currently forces the build to use Guava 11.0.2, but this is hiding at compile timeall code paths from curator which may use classes methods that aren't there. I need curator for my own work (2.4.1 Guava 14.0 was what I'd been using), so don't think we can go back. HADOOP-11102 covers the problem -but doesn't propose a specific solution. But to me the one that seems most likely to work is: update Guava -steve -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You. -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
Re: Time to address the Guava version problem
I agree that a more robust solution is to have better classloading isolation. Still, IMHO guava (and possibly protobuf as well) sticks out like a sore thumb. There are just too many issues in trying to support both guava 11 and guava 16. Independent of what we may do with the classloading isolation, we should still consider upgrading guava. My 2 cents. On Sun, Sep 21, 2014 at 3:11 PM, Karthik Kambatla ka...@cloudera.com wrote: Upgrading Guava version is tricky. While it helps in many cases, it can break existing applications/deployments. I understand we do not have a policy for updating dependencies, but still we should be careful with Guava. I would be more inclined towards a more permanent solution to this problem - how about prioritizing classpath isolation so applications aren't affected by Hadoop dependency updates at all? I understand that will also break user applications, but it might be the driving feature for Hadoop 3.0? On Fri, Sep 19, 2014 at 5:13 PM, Sangjin Lee sj...@apache.org wrote: I would also agree on upgrading guava. Yes I am aware of the potential impact on customers who might rely on hadoop bringing in guava 11. However, IMHO the balance tipped over to the other side a while ago; i.e. I think there are far more people using guava 16 in their code and scrambling to make things work than the other way around. On Thu, Sep 18, 2014 at 2:40 PM, Steve Loughran ste...@hortonworks.com wrote: I know we've been ignoring the Guava version problem, but HADOOP-10868 added a transitive dependency on Guava 16 by way of Curator 2.6. Maven currently forces the build to use Guava 11.0.2, but this is hiding at compile timeall code paths from curator which may use classes methods that aren't there. I need curator for my own work (2.4.1 Guava 14.0 was what I'd been using), so don't think we can go back. HADOOP-11102 covers the problem -but doesn't propose a specific solution. But to me the one that seems most likely to work is: update Guava -steve -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
Re: Time to address the Guava version problem
Upgrading Guava version is tricky. While it helps in many cases, it can break existing applications/deployments. I understand we do not have a policy for updating dependencies, but still we should be careful with Guava. I would be more inclined towards a more permanent solution to this problem - how about prioritizing classpath isolation so applications aren't affected by Hadoop dependency updates at all? I understand that will also break user applications, but it might be the driving feature for Hadoop 3.0? On Fri, Sep 19, 2014 at 5:13 PM, Sangjin Lee sj...@apache.org wrote: I would also agree on upgrading guava. Yes I am aware of the potential impact on customers who might rely on hadoop bringing in guava 11. However, IMHO the balance tipped over to the other side a while ago; i.e. I think there are far more people using guava 16 in their code and scrambling to make things work than the other way around. On Thu, Sep 18, 2014 at 2:40 PM, Steve Loughran ste...@hortonworks.com wrote: I know we've been ignoring the Guava version problem, but HADOOP-10868 added a transitive dependency on Guava 16 by way of Curator 2.6. Maven currently forces the build to use Guava 11.0.2, but this is hiding at compile timeall code paths from curator which may use classes methods that aren't there. I need curator for my own work (2.4.1 Guava 14.0 was what I'd been using), so don't think we can go back. HADOOP-11102 covers the problem -but doesn't propose a specific solution. But to me the one that seems most likely to work is: update Guava -steve -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
Re: Time to address the Guava version problem
I would also agree on upgrading guava. Yes I am aware of the potential impact on customers who might rely on hadoop bringing in guava 11. However, IMHO the balance tipped over to the other side a while ago; i.e. I think there are far more people using guava 16 in their code and scrambling to make things work than the other way around. On Thu, Sep 18, 2014 at 2:40 PM, Steve Loughran ste...@hortonworks.com wrote: I know we've been ignoring the Guava version problem, but HADOOP-10868 added a transitive dependency on Guava 16 by way of Curator 2.6. Maven currently forces the build to use Guava 11.0.2, but this is hiding at compile timeall code paths from curator which may use classes methods that aren't there. I need curator for my own work (2.4.1 Guava 14.0 was what I'd been using), so don't think we can go back. HADOOP-11102 covers the problem -but doesn't propose a specific solution. But to me the one that seems most likely to work is: update Guava -steve -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
