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Cannot Be Cast To Java.lang.comparable Priorityblockingqueue

Let me revert this patch till Eshcar Hillel 's discussion is closed. In the context of a thread pool using a blocking pool is probably ok. Since the InMemoryflushRunnable gets added to a queue and that is Priority based we are not able to do the queue based operations for retrieval as InMemoryflushRunnable is not Comparable. Show Hadoop QA added a comment - 09/Jun/16 12:37 -1 overall Vote Subsystem Runtime Comment +1 hbaseanti 0m 0s Patch does not have any anti-patterns. +1 @author 0m 0s The patch have a peek here

Hide Permalink ramkrishna.s.vasudevan added a comment - 13/Jun/16 11:13 I think the current patch is fine. I can only achieve an UNBOUND queue using a LinkedBlockingQueue but that's of course not sortable ! SortedSet / SortedMap are interfaces. Show Anoop Sam John added a comment - 10/Jun/16 05:07 When use the CompactingMemstore and an in memory flush happens, this is coming in right Ram? http://stackoverflow.com/questions/11430574/how-to-have-an-unbound-sortable-queue-utilized-by-a-fixed-amount-of-threads

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Meaning that the queue can't handle more than 2 submitted tasks !! What am I doing wrong here? I think my commit and your comment crossed. Any suggestions / comments?

Or you could also use the execute() method instead of the submit() method, to bypass the task creation. Removing any of the constructors was not an option as it would break older code. More discussions in Concurrency All PlacesJavaJava APIsConcurrency This discussion is archived 5 Replies Latest reply on Feb 3, 2010 4:00 PM by 843790 PriorityBlockingQueue for ThreadPoolExecutor of ExecutorCompletionService 843790 Jan 13, But the point here is that ThreadPoolExecutor accepts only BlockingQueue and ConcurrentLinkedQueue is not a blocking queue.

super K> comparator) { return new TreeMap(comparator); } public static

Configure a table with a CF that has INMEMORY flush. https://my.oschina.net/canghailan/blog/37006 more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed So I need a DashboardHtmlExport instance to call new A(i). –Muhammad Gelbana Jul 11 '12 at 10:30 add a comment| 1 Answer 1 active oldest votes up vote 9 down vote Show ramkrishna.s.vasudevan added a comment - 09/Jun/16 10:20 Patch that replaces PriorityBlockingQueue to LinkedBlockingQueue.

Terms Privacy Security Status Help You can't perform that action at this time. navigate here see in http://stackoverflow.com/questions/1301691/java-queue-implementations-which-one "The most important difference between LinkedBlockingQueue and ConcurrentLinkedQueue is that if you request an element from a LinkedBlockingQueue and the queue is empty, your thread will wait until Please turn JavaScript back on and reload this page. Save India From Corruption - Anna Hazare.

If we won't provide comparator while creating customerPriorityQueue, it will throw ClassCastException at runtime. Much Thanks!!!Reply anitha saysDecember 19, 2013 at 6:06 pm How is priority queue different from other data structures, it gives a sorted list? Stack Overflow | 4 years ago | Muhammad Gelbana java.lang.ClassCastException: java.util.concurrent.FutureTask cannot be cast to java.lang.Comparable find similars Java RT com.skycomm.cth 1 0 mark PriorityBlockingQueue for ThreadPoolExecutor of Check This Out Show Anastasia Braginsky added a comment - 11/Jun/16 19:13 The change looks reasonable for me.

Post Reply Bookmark Topic Watch Topic New Topic Similar Threads ClassCastException Question 10 Chapter 7 : K and B A question About overriding equals and hashcode for an Object Overloading (and If TreeSet / TreeMap could be changed completely, they should have no public constructors but factory methods instead (the constructors become private): public static more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

Why does Friedberg say that the role of the determinant is less central than in former times? Show ramkrishna.s.vasudevan added a comment - 10/Jun/16 04:59 can you give some background on this issue: We are trying to load batchMutates using the PerformanceEvaluation tool. Activity Ascending order - Click to sort in descending order All Comments Work Log History Activity Transitions Hide Permalink Romain Manni-Bucau added a comment - 25/May/15 15:52 agree it doesnt makes posted 6 years ago Some structures or methods simply require Comparables.

Tested and this patch works. Take a tour to get the most out of Samebug. Memstore allocated is 70% and pure write scenario. http://electrictricycle.net/cannot-be/cannot-be-cast-to-java-lang-comparable-set.html Re: PriorityBlockingQueue for ThreadPoolExecutor of ExecutorCompletionServi 843790 Jan 14, 2010 10:43 PM (in response to 843790) Well, my first problem was even bothering with a completion service in the first place.

If it is required in the future the attribute for comparison will become obvious as well. 2. This only works if the busyTime is less that the cooldown time. Show Anoop Sam John added a comment - 08/Jun/16 13:20 Not sure whether we really need a StealJobQueue here for this pool which handles the in memory flush/compaction stuff. Ravi Kiran Va Ranch Hand Posts: 2234 I like...

It's purpose is to decouple the submission process from the completion, and I want it coupled. Because of the asynchronous nature of these queues, determining the current number of elements requires a traversal of the elements." So we need to consider what is more important having a posted 6 years ago Your Employee class needs to implement the Comparable interface or you need to provide a Comparator to the TreeSet. "Any fool can write code that a computer Thanks for the feedback Eshcar Hillel.

super T>) x; while (k > 0) { int parent = (k - 1) >>> 1; Object e = array[parent]; if (key.compareTo((T) e) >= 0) break; array[k] = e; k =