In R phantomJS ran with Rselenium hangs after several iterations - r

Question

I'm using phantomJS to collect data from different sites. During data scrapping process I experience a lot of crashes when parsing sites or sites elements. Unfortunately nor phantomJS nor RSelenium don't provide any information or bag report in the console. Script just hangs without any warnings. I see that it is executing, but actually nothing happens. The only way to stop script from executing is to manually restart R. After several test I found that phantomJS usually hangs on executing remDr$findElements() commands. I tried to reran my code using firefox and RSelenium - it works normally. So the problem is in how phantomJS works.Does anyone experience anything similar when running phantomJS? Is it possible to fix this misbehavior?
I'm using:
Windows 7
Selenium 2.0
R version 3.1.3
phantomjs-2.0.0-windows
My code:
# starting phantom server driver
phantomjsdir <- paste(mywd, "/phantomjs-2.0.0-windows/bin/phantomjs.exe", sep="" )
phantomjsUserAgent <- "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.89 Safari/537.36 OPR/28.0.1750.48"
eCap <- list(phantomjs.binary.path = phantomjsdir, phantomjs.page.settings.userAgent = phantomjsUserAgent )
pJS <- phantom(pjs_cmd = phantomjsdir)
remDr <- remoteDriver(browserName = "phantomjs", extraCapabilities = eCap)
remDr$open(silent = FALSE)
mywords <- c("canon 600d", "sony 58k","nikon","nikon2","nikon 800","nikon 80","nikon 8")
timeout <- 3
#'
#' Exceuting script
#'
for (word in mywords) {
print(paste0("searching for: ",word))
ss.word <- word
remDr$navigate("http://google.com")
webElem <- remDr$findElement(using = "class", "gsfi")
webElem$sendKeysToElement(list(enc2utf8(ss.word),key = "enter"))
Sys.sleep(1)
print (remDr$executeScript("return document.readyState;")[[1]])
while (remDr$executeScript("return document.readyState;")[[1]]!= "complete" && totalwait<10) {
Sys.sleep(timeout)
}
print(paste0("search completed: ",ss.word))
elem.snippet <- remDr$findElements(using="class name",value = "rc")
for (i in 1:length(elem.snippet)) {
print(paste0("element opened: ",ss.word," pos",i))
print(elem.snippet[[i]])
ss.snippet.code <- elem.snippet[[i]]$getElementAttribute('innerHTML')
print(paste0("element element innerHTML ok"))
elemtitle <- elem.snippet[[i]]$findChildElement(using = "class name", value = "r")
print(paste0("element title ok"))
elemcode <- elemtitle$getElementAttribute('innerHTML')
print(paste0("element innerHTML ok"))
elemtext <- elem.snippet[[i]]$findChildElement(using = "class name", value = "st")
ss.text <- elemtext$getElementText()[[1]]
print(paste0("element loaded: ",ss.word," pos",i))
elemloc <- elem.snippet[[i]]$getElementLocation()
elemsize <- elem.snippet[[i]]$getElementSize()
print(paste0("element location parsed: ",ss.word," pos",i))
}
print(paste0("data collected: ",ss.word))
}