deadlock

问题 In my android application, I am trying to get AccessToken from GoogleAuthUtil as below : accessToken = GoogleAuthUtil.getToken(this, mPlusClient.getAccountName(), "oauth2:" + SCOPES); But At this line I am gettting error as below : E/GoogleAuthUtil(4696): Calling this from your main thread can lead to deadlock and/or ANRs E/GoogleAuthUtil(4696): java.lang.IllegalStateException: calling this from your main thread can lead to deadlock E/GoogleAuthUtil(4696): at com.google.android.gms.auth

问题 I've an existing stored procedure SP1 which is simple select from a table. It's being used at multiple places. Now there is a new code which uses this SP1 along with an update statement in one serializable transaction. I'm seeing deadlock where two transactions are able to acquire read lock on same set of rows and now want to convert that lock to update. One possible solution is to make this SP1 execute in read committed isolation level. But I think this is not the right fix, as there can be

问题 I've a webApp deployed on tomcat6, there's an import message function, which will import a large amount of messages persisting them into an Oracle 11g database. I'm getting the deadlock occasionally/unpredictably, after running import for a while. The trace : 7 août 2014 13:04:38 com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector run ATTENTION: com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@637d7dd6 -- APPARENT DEADLOCK!!! Creating emergency threads for

问题 Can someone tell me why the following SQL Server queries is deadlocking and what is the solution to fixing it? <deadlock-list> <deadlock victim="process88b5b8"> <process-list> <process id="process88b5b8" taskpriority="0" logused="76132" waitresource="RID: 32:1:151867:174" waittime="5093" ownerId="65554098" transactionguid="0xedf3314c05f1124cbe8d480cd092e03e" transactionname="DTCXact" lasttranstarted="2011-09-02T19:00:29.690" XDES="0x1029e040" lockMode="S" schedulerid="1" kpid="5108" status=

问题 The following code: package main import ( "fmt" "strings" ) var data = []string{ "The yellow fish swims slowly in the water", "The brown dog barks loudly after a drink ...", "The dark bird bird of prey lands on a small ...", } func main() { histogram := make(map[string]int) words := make(chan string) for _, line := range data { go func(l string) { for _, w := range strings.Split(line, " ") { words <- w } }(line) } defer close(words) for w := range words { histogram[w]++ } fmt.Println

问题 Consider traditional producer/consumer threading example. When consumer checks for buffer size not to be zero, is there any need to signal other threads before waiting on lock? Here is methods code: public void consume() { lock(_lock) { while(buf.Count == 0) { // Is there any need to *Monitor.Pulse(_lock);* here? Monitor.Wait(_lock); } // Consume } } public void produce() { lock(_lock) { // Produce buf.Insert(item); Monitor.PulseAll(_lock); } } 回答1: No, that won't deadlock: once the producer

问题 One of my friends showed me his code below, and I thought the two threads could be deadlocked, because they could deadlock while trying to acquire locks on the different variables: sb1 and sb2 . When I run the code, they don't seem to be deadlocked, as I was able to see the output: A B second thread: AB second thread: BA Code below: public static void main(String[] args) { StringBuilder sb1 = new StringBuilder(); StringBuilder sb2 = new StringBuilder(); new Thread() { public void run() {

问题 Is there a mechanism in MySQL (5.6 or later) to have a transaction (or statement) to volunteer to be a victim in the case it is involved in a deadlock? With InnoDB deadlock detection on, when a deadlock is identified, InnoDB determines which transaction to kill (to be the victim) in order to allow the other transaction(s) to proceed. There's an algorithm used to determine which transaction is the victim. My question is whether there is any syntax that we can use in a statement that will

问题 I have a table in mariadb where I save links to some RSS feeds: id | url | done ------------------------------------ 1 | http://example.com/rss | true 2 | http://example.org/rss | false 3 | http://google.com/rss | false When now one process/worker is updating one of the RSS feeds I want it to hide the row from other processes/workers so that they don't do the work twice and deadlock. Using SELECT ... IN SHARE MODE or SELECT ... FOR UPDATE does not work as the row is still visible and will

问题 I'm a little confused on how to handle deadlocks in innodb. Here's acommon scenario i've found online: while (some deadlock condition) { try { begin transaction query 1 query 2 // let's assume this one failed with a deadlock ... query N commit } catch { make sure it's a deadlock AND rollback } } Question 1: So assuming query 2 fails, shouldn't i simply reapeat that query instead of rolling back the entire transaction and only roll back after X attempts? Question 2: Could a simple select