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Hadoop QA commented on ZOOKEEPER-2891: -------------------------------------- +1 overall. GitHub Pull Request Build +1 @author. The patch does not contain any @author tags. +0 tests included. The patch appears to be a documentation patch that doesn't require tests. +1 javadoc. The javadoc tool did not generate any warning messages. +1 javac. The applied patch does not increase the total number of javac compiler warnings. +1 findbugs. The patch does not introduce any new Findbugs (version 3.0.1) warnings. +1 release audit. The applied patch does not increase the total number of release audit warnings. +1 core tests. The patch passed core unit tests. +1 contrib tests. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/996//testReport/ Findbugs warnings: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/996//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html Console output: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/996//console This message is automatically generated. > SIGABRT from assert during fake completion on zookeeper_close. > -------------------------------------------------------------- > > Key: ZOOKEEPER-2891 > URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2891 > Project: ZooKeeper > Issue Type: Bug > Components: c client > Affects Versions: 3.4.10 > Environment: Linux ubuntu 4.4.0-87-generic > gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609 > https://github.com/apache/zookeeper.git > branch-3.4 > Reporter: Alexander A. Strelets > Priority: Critical > Labels: easyfix > Fix For: 3.4.10 > > > Function *_deserialize_multi()_* hits *_assert(entry)_* when called for the > so called "Fake response" which is fabricated by the function > _free_completions()_ for example when _zookeeper_close()_ is called while > there is a pending _multi_ request. > Such fake response includes only the header but zero bytes for the body. Due > to this {{deserialize_MultiHeader(ia, "multiheader", &mhdr)}}, which is > called repeatedly for each {{completion_list_t *entry = > dequeue_completion(clist)}}, does not assign the _mhdr_ and keeps _mhdr.done > == 0_ as it was originally initialized. Consequently the _while (!mhdr.done)_ > does not ever end, and finally falls into the _assert(entry)_ with _entry == > NULL_ when all sub-requests are "completed". ~// Normally on my platform > assert raises SIGABRT.~ > I propose to instruct the _deserialize_multi()_ function to break the loop on > _entry == NULL_ if it was called for an unsuccessfull overal status of the > multi response, and in particular for the fake response having _ZCLOSING_ > (-116) status. I have introduced the _rc0_ parameter for this. > *Another issue* with this function is that even if the while-loop exited > properly, this function returns _rc == 0_, and this return code +overrides+ > the true status value with {{rc = deserialize_multi(xid, cptr, ia, rc)}} in > the _deserialize_response()_ function. So, the _multi_ response callback > +handler would be called with _rc == ZOK_ instead of _rc == ZCLOSING_+ which > is strictly wrong. > To fix this I propose initializing _rc_ with the introduced _rc0_ instead of > zero (which is _ZOK_ indeed). > This is a proposed fix: https://github.com/apache/zookeeper/pull/360 -- This message was sent by Atlassian JIRA (v6.4.14#64029)